Fingerboard Extension Shim

Supersport · #1 07-22-2020, 07:10 AM

I built this guitar about 20 years ago and it always had a dip down on the extension so i pulled apart last night and it pulled up a good bit of the soundboard. I was able to salvage some of it to glue back in place but there will be voids where i couldn't.

Questions are:
What kind of glue to replace salvaged wood and what to use to fill in any voids for a flat surface for re-gluing?

Board is ebony bound with cocobola. Ebony shim probably won't be too noticeable since they are both dark but any harm in using cocobola for a better appearance?

I am a hobby builder only but this is my favorite guitar. Neck doesn't require a reset, just the dip because i do play up there some. It is a bolt on BTW.

Thank you for any help!!

Brian

redir · #2 07-22-2020, 08:03 AM

Pics would help but it's probably nothing to worry about especially if you pulled the splinters out and glued them in. Titebond is perfect for that. Really you just need enough glue to tack the FB tongue down given that your bolt on joint is solid. A few voids won't be a problem.

Supersport · #3 07-22-2020, 08:08 AM

ok I'll take a few tonight...thank you!!

John Arnold · #4 07-22-2020, 04:22 PM

This is not a highly stressed joint, so leaving a few gaps is not a problem. If you do choose to fill them, use slivers of the same wood as the top, glued with Titebond or hot hide glue.

Quote:

any harm in using cocobola for a better appearance?

Nope.

Supersport · #5 07-23-2020, 07:17 AM

Supersport · #6 07-23-2020, 07:18 AM

Supersport · #7 07-23-2020, 07:19 AM

Supersport · #8 07-23-2020, 07:21 AM

Supersport · #9 07-23-2020, 07:22 AM

the last pic is the tear out pieces laid in their places to be glued.

mirwa · #10 07-23-2020, 07:42 AM

Ouch...

With that amount of damage I would consider epoxy as a filler and adhesive

Steve

Supersport · #11 07-23-2020, 10:47 AM

really? Epoxy? i was considering using a dremel router to cut out level and even and graft in a new piece of spruce & finish flush?

Wouldn't that be a better option?

redir · #12 07-23-2020, 11:14 AM

Can't see pics.

Supersport · #13 07-23-2020, 11:52 AM

Quote:

Originally Posted by redir

Can't see pics.

sent you a pm with one pic...if you see that I'll send the rest

redir · #14 07-24-2020, 07:26 AM

Quote:

Originally Posted by Supersport

sent you a pm with one pic...if you see that I'll send the rest

I cannot see that one either, it has somethign to do with Google photo's I think.

But if Steve was shocked seeing the pic then it must be concerning

I think your idea about inlaying a graft is a good one.

mirwa · #15 07-24-2020, 08:29 AM

Quote:

Originally Posted by Supersport

really? Epoxy? i was considering using a dremel router to cut out level and even and graft in a new piece of spruce & finish flush?

Wouldn't that be a better option?

Sure, your option 2-3hrs work, hopefully a good result, over a 3 day or so period, my option, 15 seconds guaranteed good result.

People over think things when it comes to repairs, many guitars are built with epoxy on the glue joints.

Alternatively take the time make a pocket and turn it into a fully bolted on neck.

Steve