Trade Secrets!

Make a "stunt double" guitar body for benchtop work


Issue 103 December 24, 2009

Photo: stunt cycle Why endanger a guitar?
Here’s how I made a
“stunt double” guitar
body for benchtop work
Keep guitar bodies safe in their
cases while this hunk o’wood
takes all the knocks!

Erick Coleman, December 24, 2009
Photo: Erick Coleman
Photo: fret file If you’ve ever scratched a customer’s guitar while doing fretwork, you know that terrible feeling. You’re dressing frets, they’re looking great, you’re just about done... Life is good!
Then the tip of your 3-corner file puts a ding in the guitar body. Life is misery!
Of course, this never happens to me,
but I’ve heard about it. ;-)
To avoid that situation, I made myself a surrogate body.
Photo: Erick and Neck JigAt our shop, United Lutherie, Gene Imbody and I use the Erlewine Neck Jig for neck adjustments and fretwork. While we work, the jig holds the neck in the same curve as when it’s strung up and being played.
When the guitar has a bolt-on neck like a Fender, I don’t strap the body into the jig. Instead, I take the neck off and bolt it onto a special block of wood. The guitar body stays safely in its case while the neck is on this surrogate body block, where I can work on it freely. I get complete access for truss rod wrenches and fret files, and the body’s never in my way.
Even if you don’t use the neck jig, a surrogate body is handy. I’ve heard of people keeping a preshaped Strat body around and routing wood from around the neck pocket just for this purpose. But I prefer this shaped block I’ll show you below — it mounts on the neck jig, or you can clamp it in a vise instead.
Truss Rod Wrench Set
Photo: Nik & Gene When up-and-coming repairman Nik Gruber recently finished his apprenticeship with my shopmate Gene, I made Nik a going-away present of a surrogate body and I took pictures for Trade Secrets to show how you can make one for your shop.
Image: surrogate body plans The plans for this surrogate body are available online in the free information at stewmac.com. You'll find the plans here — in the instructions for the Neck Jig.
StewMac is always creating new how-to sheets and instructions, and posting them online for free.
Photo: Neck Jig
Photo: scrap wood Scrap wood is all you need.
I rounded up several plywood scraps that fit the dimensions of the online plan. I included a good chunk of alder that had been laying around forever, but that’s overkill — anything will do.
Photo: gluing Photo: clamped upI glued up a wood sandwich, and clamped it overnight.
Franklin Titebond Glue
Photo: blank block The next day, I cleaned up the edges on my belt sander, making sure my lump-o’-wood was nice and square.
Photo: tracing the shape IPhoto: marking screw holes used our shop’s computer printer/copier to enlarge the plans. By taping two printouts together, I had an actual-size template to trace onto my blank.
Photo: body block After bandsawing the rough shape, I cleaned it up on the belt sander. I marked and drilled all the holes indicated on StewMac’s plan.
Photo: finished surrogate body Bingo! That’s the surrogate body! If this stunt double is going to be a stand-in for the dangerous work, he should look the part: just for fun I sprayed a clownburst using Colortone tinted aerosols.
I installed a top loading guitar bridge and standard bass bridge. This stunt man is ready for action.
ColorTone Tinted Aerosol Guitar Lacquer
Dan Erlewine designed the surrogate body to give full access to the heel end truss rod adjustment of any bolt-on neck while it’s under string tension. The shape lets you work with lots of elbow room on the high frets, with no risk of damaging the body. (A slip of the file turns a fret job into a refinish job in about one second!)
It also means I can encourage my customers to leave their bodies at home:
Top-Loading Hardtail Bridge
Photo: neck arriving by UPS It’s become commonplace for UPS to deliver us a small (inexpensive to ship) box containing a neck instead of a whole guitar. Shipping the guitar body is one more invitation to damage, too. This method only works for customers who are able to do their own basic setup work, but there are quite a few who can.
Gotoh Standard Bass Bridge
Photo: Nik with surrogate body When you’re done with the fretwork you can set the surrogate up like you would a regular guitar to make sure all is well before sending it back to your customer. Here’s to you, Nik — enjoy using your Stunt Man Body Double!
Problem-solving products for this kind of work:
Franklin Titebond Glue
Aliphatic-resin glue for instrument building and repair.
ColorTone® Tinted Aerosol Guitar Lacquer
ColorTone® tinted aerosol guitar lacquers let the beauty of fine instrument woods show through.
Top-Loading Hardtail Bridge
The strings attach quickly and easily to slots in the bridge base rather than feeding them through the guitar's body.
More More More
Gotoh Standard Bass Bridge
Adjustable bridge for solidbody bass, with 2-1/4" string spread.
Notched Straightedge
Check the straightness of the fingerboard with the frets in place!
Erlewine Neck Jig
The revolutionary string tension simulator that takes the guesswork out of fretwork and fingerboard leveling.
More More More

Don't miss an issue!

Get Trade Secrets delivered to your inbox. Only from StewMac.