Leigh Super12 User manual

Joining Tradition with Today
Leigh Router Joinery Jigs
Dedicated Customer Support
1-800-663-8932

CONTENTS and STANDARDS
ii
SUPERJIG-12-18-24 User Guide
Your New Leigh Dovetail Jig
Congratulations! You now own a most useful and versatile
dovetailing tool.The Leigh Superjig Dovetail Jig will help you
cut an infinite variety of joints, and all of its major functions
are described in detail in this user guide, plus there’s a slide-out
Quick Reference Guide underneath the jig. A very helpful
DVD is also included, but the user guide is essential reading.
We recommend that you first assemble and mount the jig,
carefully following the instructions in the first section of the
user guide. Then read the rest of the guide, following along
with the basic functions and principles of operation, before
you try to do any actual joinery routing. By all means, cut a
few practice joints in scrap boards before you use the jig to
rout a precious hardwood work piece!
If you have questions not answered in this user guide, please
call the Leigh customer support line: 1-800-663-8932
or email Leigh: [email protected].
But remember: “If at first you don’t succeed, read the instruc-
tions!”
*See Appendix IV – Customer Support
Important! Inches and Millimeters
The Superjig can be ordered in inch or metric versions.They’re
identical except for the calibration scales. This Leigh English-
language user guide show measurements in both inches and
millimeters, with “inches” first, followed by “millimeters” in
square brackets.
Example:
3⁄4"x 51⁄2"x8" [20x140x200mm]
Do not be concerned if the inch/millimeter equivalents are not
exact. Just use the dimensions which apply to your jig.
Where finger assembly scales overlay an illustration, the “inches”
scale will be at the top, the “millimeters” scale will be at the
bottom. Only the front “active” half of the scales are illustrated.
For clarity, setting positions are indicated with a red line in the
user guide only. On the jig, the lines are black.
1
2

iii
CONTENTS and STANDARDS SUPERJIG-12-18-24 User Guide
Contents and Standards ........................................................................................... iii
Chapter 1 – Jig Assembly, Mounting, and Using The Clamps .................................. 1
Chapter 2 – Adjusting the Finger Assembly ............................................................. 7
Chapter 3 – The Leigh e-Bush and Optional Guidebushes....................................... 9
Chapter 4 – Basic Jig Functions and Scale Modes ................................................... 11
Chapter 5 – Using Your Jig Safely............................................................................ 13
Chapter 6 – Wood Preparation ................................................................................ 15
Chapter 7 – Router Preparation............................................................................... 17
Chapter 8 – Through Dovetail Procedures .............................................................. 19
Chapter 9 – Variably Spaced Half-Blind Dovetail Procedures ................................ 29
Chapter 10 – Single Pass Half-Blind Dovetails ........................................................ 37
Chapter 11 – Rabbeted Half-Blind Dovetails .......................................................... 45
Chapter 12 – Asymmetric Dovetails ....................................................................... 47
Chapter 13 – Sliding Dovetails................................................................................. 51
Chapter 14 – Box Joints............................................................................................ 57
Chapter 15 – Hints and Tips ..................................................................................... 63
Appendix I – Attaching the Leigh e-Bush to the Router ........................................ 67
Appendix II – Bit Selection....................................................................................... 69
Appendix III – Jig Parts............................................................................................. 75
Appendix IV – Customer Support............................................................................ 79
TECHNICAL BULLETINS
Downloadable pdfs are available at leighjigs.com on the Support page for
these How To’s and more for your Leigh Super Jig:
• Inlaid Through Dovetails On The D1600 and Super Jigs
• Wider Pins on the D1600 Jig and Super Jigs
• End-on-End Dovetails on the D1600 and Super Jigs

CONTENTS and STANDARDS
iv
SUPERJIG-12-18-24 User Guide
1
2
1
Glossary of Symbols
To help you understand the instructions and illustrations in this
user guide, we have used a number of international symbols, plus
a few special ones of our own.They are all explained below. You
needn’t worry about memorizing these symbols now, because
they are repeated quite frequently throughout the user guide,
and you will soon get used to them.
The Leigh jig’s guidefinger assembly can be in any one of four
joint modes, depending on what type of joint and which part
of the joint you are routing. Each finger assembly scale has it’s
own mode icon , identifying that joint part. You will also find
the joint mode icon in the top left corner of most illustrations
, indicating which finger assembly mode to use.
Sometimes a joint mode icon will be used to identify a board .
These are the four joint mode icons:
TD Tails
(tails for through dovetail joints)
TD Pins
(pins for through dovetail joints)
HB Tails
(tails for half-blind dovetail joints)
HB Pins
(pins for half-blind dovetail joints)
3

v
CONTENTS and STANDARDS SUPERJIG-12-18-24 User Guide
Which Way Round Should the Board Go?
As virtually all dovetail joinery is used to make boxes,
drawers and chests etc., we devised these simple (and
hopefully intuitive) icons to indicate which side of a
board faces inwards or outwards on the finished “box”,
and which side of the board faces outward (toward
you, the operator), when it is clamped in the jig.
The following symbols indicate:
eThis edge against sidestop
fThis edge against sidestop
Sawcut allowance
 Caution: use special care for this operation
 Numbered References in text
This icon oindicates the “outside”
of a board. All through dovetail
pin boards are mounted in the
jig with this “outside” face away
from the jig (toward you, the
operator).
This icon iindicates the “inside”
of a board. All half-blind pin and
half-blind tail boards, and through
dovetail tail boards, are mounted
in the jig with the “inside” face
away from the jig toward you,
the operator.
This icon jindicates boards that
are mounted both ways e.g. sliding
dovetails and box joints.
Dotted line icons indicate the
“other” side of the board in the
illustrations.
Centerline of board or layout
Equals
Does not equal
Approximately

CONTENTS and STANDARDS
vi
SUPERJIG-12-18-24 User Guide
VRS Models
Item VRS12 Vacuum & Router Support for the Super 12 Dovetail Jig
Item VRS18 Vacuum & Router Support for the Super18 Dovetail Jig
Item VRS24 Vacuum & Router Support for the Super 24 Dovetail Jig
Dust-Free Routing!
The revolutionary Leigh VRS Vacuum & Router Support* provides almost 100%
dust and chip collection as well as amazing full width router support. The VRS
is a must-have for all Leigh dovetail jig owners.
*US patent: USPN 7,507,060 B2 UK patent: GB2446909
Here’s How It Works
The VRS is mounted on brackets on the front of the jig and the router is sup-
ported by the finger assembly and the full width beam of the VRS. The vacuum
chute rides under the router support beam. Control arms, attached to the
vacuum chute, surround the router. These arms are adjustable to accommodate
any router base. As the router moves across the joint, the vacuum chute glides
effortlessly from side to side on nylon rollers. The chute is always in perfect
position to catch the dust and chips thrown out by the router bit. Chips and
sawdust are drawn into the vacuum chute and down through the vacuum hose.
Each VRS comes complete with two adaptors to fit all popular vacuum hose
sizes and the VRS can be used with a small shop vac or a large built in system.
The VRS is easily attached without jig modification. Each VRS comes complete
with all mounting hardware needed for any Leigh 24" D-Series jig, all Super
Jigs or the earlier model Leigh D1600.
VRS Vacuum & Router Support Features
• Full width router support
• Easy on Easy Off. Powerful rare earth
magnets secure router support beam
• Park the router when not in use
• Vacuum box glides effortlessly under
router support beam
• Control arms position vacuum box
• Control arms adjust to any router
• No hoses to obstruct view
• No jig modifications necessary
• Models for all Leigh jigs
• All mounting hardware included
• Adapt to any hose size
The dust chute rides beneath the
router support beam. Control arms
ensure accurate positioning of the
chute and the size and shape of the
chute ensures total waste collection
regardless of bit size or joint type
being routed.
The VRS will work with almost any
shop vac or large vac system. Two
adaptors are included with every
VRS to handle hose sizes from 1"
to 2-1/2".
The VRS is a full width router support.
When the work piece has been routed
on one side of the jig, the router can be
effortlessly moved to the other side of
the jig and parked while the work piece
is being changed. There is no need to
remove the router from the jig.
Because the vacuum box is always
in perfect position relative to the
router bit, the dust and chips com-
ing off of the router bit are auto-
matically drawn into the chute and
vacuum hose.
Accessory Kits
Item AC12 VRS12 and 1607-8 Bit Set for the Super 12 Dovetail Jig
Item AC18 VRS18 and 1607-8 Bit Set for the Super 18 Dovetail Jig
Item AC24 VRS24 and 1607-8 Bit Set for the Super 24 Dovetail Jig
Standard Equipment
• Router Support Beam
• Vacuum chute
• Hose adaptors – small and large
• Support rails
• Screws and washers
• Hex key
Leigh VRS
Vacuum & Router Support

10
1 2 3 4
65 7 8
9
Jig Assembly, Mounting,
and Using the Clamps
SUPERJIG - CHAPTER 1
Make Sure You Have All the Parts.
Before you start to assemble your Leigh SUPERJIG, check to make sure you have received all the required parts.
The small carton you removed from the end of the main
carton contains:
1. 2 support brackets
2. 4 cam-action speed clamps
4 cam clamp pivot nuts
3. 1 e7-Bush & Nut with Pin Wrench
2 each, front and rear Side Stops
1 Spacer
4. 2 support knobs
5. 4 clamp springs
4 clamp T-bolts
4 flat washers
4 T-bolt nuts
4 Jig Hold-down Wood Screws No.10 x 1"
6. 2 scale thumbscrews c/w nylon washers
7. 2 Dovetail bits, 1 straight bit, 1 Collet Reducer
8. Square-head guidefinger screwdriver
Also included are any other small optional items you
may have ordered with your new jig. Check the packing
slip for this information.
The main carton contains:
9. 1 main jig body
1 Leigh jig User Guide
Warranty/Registration Card
DVD instructional video (English only)
The large inner box contains:
10.1 finger assembly on a bar, complete with scales
Super12, with 13 guidefingers
Super18, with 16 guidefingers
Super24, with 19 guidefingers
2 lengths bridge material – see Chapter 9
1 crosscut fence (same as bridge) – see Chapter 13
2 clamp bars c/w end plugs
1 Nylon Stop Rod – see Chapter 10
1 Quick Reference pull-out card
If any items are missing from your jig, contact your supplier
or Leigh Industries immediately.
Important Note
Mount your jig securely, assemble it completely,
and make sure you have read and understood the
Safety section of this user guide before using the jig.
1

JIG ASSEMBLY, MOUNTING, AND USING THE CLAMPS
2
Chapter 1 Super Jig-12-18-24 User Guide
1-1 Install Side Stops Insert two clampT-bolts through the
rear jig body holes and place a “stepped” rear side stop over each
bolt , using the rear part of the double-hole . Make sure the
bolt's “T” is between the extrusion ribs ➃. Don’t forget the steel
washer ➄and use a ½"[13mm] wrench to tighten the nuts.
3
1
4
4
1
2
5
1-2 Insert the two front clamp T-bolts through the jig body
holes. Make sure the bolt's “T” is between the extrusion ribs.
Place a front side stop and steel washer over each bolt but only
finger-tighten the front nuts; you will need to index these to the
rear stops later.
1-3 Prepare a flat ¾"[20mm] mounting board (plywood or MDF),
at least 5"[125mm] wide. Length : 26" for Super12, 32" for Super18,
40" for Super24 [660, 830 or 1000mm respectively]. Clamp it to the
front of your bench. Center the jig on the board, front face slightly
overhanging the board edge . Mark the four hold down screw posi-
tions. Drill small pilot holes at a slight angle .
2
3
5"
[125mm]+ 1
1-4 Quick Reference Pull-Out Decide which end
of the jig you wish to access the “Quick Reference” instruction
pull-out and place the jig over the pull-out . Using the screws
provided; screw the jig to the board. Make sure that the pull-out
slides freely.
1
1-5 Place four springs and two clamp bars on the T-bolts.
Make sure the clamp bars move freely on the T-bolts.
1
1
1-6 Screw a clamp lever assembly onto each T-bolt.

3
JIG ASSEMBLY, MOUNTING, & USING THE CLAMPS Chapter 1Super Jig-12-18-24 User Guide
1-7 Now you need two boards about ¾" x 6" x 8" long
[20 x 150 x 200mm]. Both must have perfectly square ends to accu-
rately index the front and rear side stops.
Check for squareness: stand both pieces vertically on a flat surface. Make sure side edges are flush at bottom and top .
Turn one piece around on its end . If side edges are flush top to bot-
tom , the boards are square. If not, ➃; cut two that are.
90˚
90˚
90˚
90˚
1
4
2
3
1-8 Align Front Side Stops Clamp one square ended board
in the front, not touching the left side stop and with the top edge above
the top surface of the jig body . Place the other square board in the rear
clamp, tight against the left rear side stop , with its front edge touching
flush across the rear of the vertical board . Tighten the rear clamp.
Note: Do not overtighten the right hand clamps during this step.
3
90˚
90˚ 1
2
1-9 Now loosen the front clamp and position the front board so
its top end edge is perfectly flush and level with the top face of the
horizontal board and, both boards left edges are also perfectly
flush . Tighten the clamp.
1
2
1-10 Now push the front left side stop inwards and flush against
the vertical board and firmly tighten the clamp bolt nut.
Repeat operations 1-8 thru 1-10 at the right side of the jig. The
front and rear side stops are now indexed to provide accurate
board alignment in all routing procedures. You may now remove
the boards.
1
2
1-11 Insert the right and left support brackets. Attach the knobs,
raise them to full height and tighten the knobs.
Note: For clarity, the set lines on support brackets are shown in
red in this user guide. The actual bracket lines are black.
1
1-12 Make up a 3⁄4"x 6"[20 x 150mm] finger support board as
shown. Lengths: 11"[280mm] for Super12, 17"[430mm] for
Super18, and 23"[600mm] for Super24. Use MDF or plywood
for flatness and stability. This board will support the guidefinger
assembly in all front-clamping vertical board modes. Clamp it
in the rear of the jig.

JIG ASSEMBLY, MOUNTING, AND USING THE CLAMPS
4
Chapter 1 Super Jig-12-18-24 User Guide
1-13 Before using the jig, the scales must be set into position on
the finger assembly. Install the two thumbscrews a few turns into
the scales . Loosen the scale lock screw at each end by one
turn only.
1
2
1
1
1-15 Pull up on the finger bar while pushing down on the
scale to ensure the bar is touching the two registration pads 
inside the scale. Maintain pressure and tighten the scale lock-
screw ➃. Repeat at the other end. To maintain correct finger
assembly alignment, follow this procedure whenever you remove
the scales from the finger assembly.
3
4
2
1
1-16 With the finger assembly in dTD Pins mode , move the
outer end guidefingers to touch the scale block and lock in posi-
tion . Note: the outer end guidefingers are used for router support
only. When guidefingers are loosened, the finger assembly should
easily slide on the support brackets. If not, apply a little candle
wax to the mating surfaces.
1
2
1-17 Finally, slip the Spacer on the outside of the left rear side
stop , the nylon stop rod through its storage hole in the left end 
and the pin wrench in its slot in the right hand end housing .
1
2
3
1-18 With Superjig assembled and mounted, you have some
items left over:
1-14 Slide the finger assembly onto the support brackets, in
the dTD Pin mode and set on the 1⁄2"[12,7mm] setting. First,
tighten both thumbscrews .
Do not lower the assembly onto the finger support board.
1 Leigh jig user guide
1 DVD instruction video (English only)
1 Leigh e7-Bush and nut
2 Dovetail bits
1 Straight bit
1 Collet Reducer
1 square-head screwdriver
3 bridge-piece/crosscut extrusions
IMPORTANT

5
JIG ASSEMBLY, MOUNTING, & USING THE CLAMPS Chapter 1Super Jig-12-18-24 User Guide
1-19 The Jig Clamps Use a piece of flat, even-thickness wood
to familiarize yourself with the jig cam clamps. You will operate
the cam-action speed clamps every time you use the jig, so get
used to the feel of the clamps first. Do not force the cam-action
speed-clamp. It has great leverage, and excessive force may damage
the workpiece or the jig.
1-20 A smooth, firm action is enough to engage the clamp.
Rule of thumb: If you can't throw the lever by pressing the end
of it firmly with your thumb, reduce the tension. Firm thumb
pressure is about right. A few minutes of trial and error will help
you feel the right clamp tension.
1-21 For all but the wider workpieces, you need only operate the
clamp on the workpiece end of the jig to release the board . For
narrower boards, the clamp at the free end should be just tight
enough to bow the clamp bar about 1⁄16"[2mm] .
1
2
3
1-22 When engaged, the front clamp levers should normally point
down and the rear levers should point away from the operator 
or up to 90˚ either side as required to obtain the optimum
clamping pressure.
1
2
2
1
1-23 To gain height for a more comfortable working position
or for routing longer boards, mount the jig to a box that can be
bolted securely to a bench.
See also15-13. ■

JIG ASSEMBLY, MOUNTING, AND USING THE CLAMPS
6
Chapter 1 Super Jig-12-18-24 User Guide

Adjusting the
Finger Assembly
SUPERJIG - CHAPTER 2
7
2-1 Practice with the finger assembly height adjustment. Loosen
the support bracket knobs and hold them firmly. Raise and lower
the assembly evenly, keeping it level , and tighten the knobs to
lock it at various heights. Do not raise or lower only one end of
the finger assembly.
1
1
2-2 To practice adjusting the guidefingers, put a board in the front
clamp. Always raise the finger assembly slightly, approximately
1⁄16"[2mm] above the spacer board and/or workpiece .This is
essential to allow the guidefingers to move freely on the guidefinger
bar and ensures that the fingers will be level and flush when locked
up. Move the guidefingers by pushing on the middle to slide them
along the guidefinger bar.
1
2-3 Loosen about half the guidefingers and practice unlock-
ing, moving, positioning and re-locking them. Always press on
the center of the guidefinger when tightening the screws. This
ensures that the small pads on the inside of the finger contact
the face of the finger bar and keeps all the fingers level.
1
2
2-4 Do not over-tighten the guidefinger lock screws. The Leigh
screwdriver provided will give ample torque for easy lock-up with-
out strain.
Hint: Fingertip tighten a loose screw until the slightest resistance is
felt. Do not tighten the screw more than half a turn (180˚) from the
first contact.

ADJUSTING THE FINGER ASSEMBLY
8
Chapter 2 Super Jig-12-18-24 User Guide
2-6 You can adjust the guidefingers by eye, or by measurement
to suit a set of plans.
■
2-5 Always tighten unused guidefingers before routing, as
router vibration may cause loose screws and finger lock parts to
fall out and be lost.
20"
3/4"thick
1 1/4" centres
3/4"thick
1/4"
1
1
2346
578910
11
121314 1516 17181920 21 22324
25
26
2728
31
33
34
32
31
30
29
2345678910
11
1213

SUPERJIG - CHAPTER 3
The Leigh e-Bush and
Optional Guidebushes
The guidebush is the vital link between router and jig. All joints created on a Superjig are routed with the unique
e7* elliptical guidebush, a Leigh innovation that provides precise joint fit adjustment for box joints and sliding dovetails.
If your router doesn’t accept the e7-Bush, you can use an alternative guidebush with some limitations.
*Supplied with each Superjig. U.S. Patent No. 8,256,475. UK Patent No. GB2443974. Patent Pending in Canada.
9
3-1 The Leigh e7-Bush  is used to rout through, half-blind,
single pass half-blind and sliding dovetails on a Superjig. The
elliptical design provides precise joint fit adjustment for box joints
and sliding dovetails. A round 7/16"[11,1mm] guidebush  (min.
barrel length 1/4"[6,35mm]), can be used to rout through, half-blind,
and sliding dovetails on the Superjig, but the e7-Bush is superior.
These images were copied from D4R Pro UG Fig’s 8-42 and 3-2
1 2
7/16
" [11,1mm]
[6,35mm]
1/4
" min.
3-2 The Leigh e7-Bush that comes with your Superjig is a
unique template guidebush that is adjustable in size. Unlike regular
circular template guidebushes , the e7-Bush is slightly elliptical
in cross section . This simple innovation effectively changes the
guidebush “active diameter size” when it’s rotated, and provides
benefits not possible with a standard round guidebush.
1
2
3-3 The e7-Bush (7/16") fits the router base or a guide bush
adaptor in the base (see Appendix I). The ellipse/oval shape has
a major axis 7/16"[11,1mm], and minor axis 7/16"[11,1mm] less
.020"[,5mm]. Turning the e-Bush 90 degrees in the router base changes
the active diameter by .020"[,5mm] providing minute adjustment and
recordable settings for perfectly fitting box joints.
1
21
2
7⁄16"[11,1mm] 7⁄16"[11,1mm] less .020"[,5mm]
3-4 To install the e7-Bush, follow these simple steps. Hold the
router the way you normally hold and operate it on the jig. Now,
up end the router in the same orientation.

THE LEIGH e-BUSH AND OPTIONAL GUIDEBUSHES
10
Chapter 3 Super Jig-12-18-24 User Guide
1 3/8"
0.100"
1 3/16"
3-7 Use the pin wrench to align the No. 10 on the eBush to the
reference line on the router base. The No.10 setting is used for all
through and variably spaced half-blind dovetails on Superjigs.
Settings for single pass half-blinds, box joints and sliding dove-
tails are described in applicable chapters. Be sure to retighten the
e-Bush nut after each adjustment.
3-8 The bit goes through the guidebush and fits in the router
collet or chuck.
3-9 The projecting part of the guidebush runs along the side
edge of the guide finger. The rotating bit cuts the wood only, and
touches neither the guidebush nor the guide surface. ■
3-6 Think of the router base as a clock face. Make a small scratch
line or permanent ink mark on the router base or e-Bush adaptor
at the 12 o’clock position . This will be your reference mark for
all e7-Bush settings.
12 o'clock
3-5 To fit the Leigh eBush directly to your router, the router
base must have a 1-3/8" diameter counter bore. If your router
base does not have the correct counter bore, you will need a guide
bush adaptor or aftermarket router base plate. Leigh offers several
guide bush adaptors to fit many common routers. See the Guide
Bush Adaptor Selection Chart in Appendix 1, page 68.
1 3/8"
1 3/16"
0.100"

Basic Jig Functions
and Scale Modes
SUPERJIG - CHAPTER 4
Here are the basics for understanding the different Superjig dovetail modes and settings.
2. TD PINS
3. HB TAILS
4. HB PINS
1. TD TAILS
THE FOUR SCALE MODES
The Finger Assembly attaches to the support
brackets in four different modes to match the
type of joint you are cutting.
This line is for the finger assembly
scales. The line is illustrated in red
for clarity in this user guide, but is
black on the jig.
Note: Inch scales are shown here.
Millimeter scales have similar
layouts.
The inactive scale is always on
the rear of each scale assembly
and is upside-down.
The active scale is always on the
front of each scale assembly.
Scales are color coded.
• Green: Half-Blind Dovetails.
• Silver: Through Dovetails.
Each scale has its own mode icon
(a drawing of the joint part made
in that mode).
Reading scales
from directly
above helps
sight the lines
accurately.
The specific settings for each scale
are fully described in the appropri-
ate chapters.
11

BASIC JIG FUNCTIONS AND SCALE MODES
12
Chapter 4 Super Jig-12-18-24 User Guide
4-1 The two clamp bars hold workpieces horizontally or
vertically. The side stops align the boards in the correct position
each time.
1
1
2
2
2
2
4-2 The guidefinger assembly slides in the support brackets
above the workpiece. The finger assembly is adjusted in or out
using calibrated scales on each end to suit different thicknesses of
vertical boards.
1
2
2
4-3 The finger assembly is raised or lowered using the support
brackets to suit different thicknesses of horizontal boards.
■

Using Your Jig Safely
SUPERJIG - CHAPTER 5
Safety is not optional.
Read and follow the recommendations in this chapter.
5-4 Always disconnect the power source from the router when
fitting bits or guidebushes, or making adjustments.
Before connecting the router to the power source, make sure the
bit and collet revolve freely in all the areas you plan to rout, and
the bit does not touch the guidebush or jig.
5-1 Read the user guide that came with your router. It is
essential to understand the router manufacturer’s instructions
completely. Always operate variable speed routers at the fastest
possible speed.
5-2 Always wear approved safety glasses.
Always wear hearing protection.
Protect yourself from harmful dust with a face mask.
For complete comfort and convenience, get yourself a Leigh VRS
(Vacuum & Router Support) to match your jig model.
5-3
Never drink alcohol or take medications that may cause drowsiness when you will be operating a router.
13

USINGYOUR JIG SAFELY
14
Chapter 5 Super Jig-12-18-24 User Guide
5-5 Do not tilt the router on the jig.
Keep the router flat on the jig assembly.
Note: The optional Leigh VRS attachment prevents router tilting.
5-6 If you insist on removing the router from the jig while it
is still revolving, always pull it straight off the jig horizontally,
and do not raise or lower the router until it is completely clear
of the jig.
1
5-7 Do not rout at face level. 5-8 Never release the router plunge mechanism when using
dovetail bits. Check if your plunge router has a stop nut to prevent
this from happening accidentally.
5-9 If you have never used your router before, be sure to follow
the router manufacturer’s instructions for its use. Make plenty
of simple open-face practice cuts without a guidebush before
you try to use the router on the Leigh jig. You must, of course,
always use a guidebush when routing on the Leigh Jig. ■