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Private member DiscussionNeck Reset Database

Spanish Heel failure

Hi all, I got a Do Santos DSMSCC RC in shop, the Spanish heel has failed , or rather collapsed into the soundboard, splitting it on both sides along the grain, a broken brace just under the fingerboard extension , cracks on both sides on the top/side bindings, I measured wood humidity on the fingerboard 9% and inside the (very inaccessible) body 11% The normal procedure would be to re-humidify before jacking or clamping back into place ,…

11 replies
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@member More Picture of the Decapitation ...
Private member DiscussionAcoustic Builds

Hide Glue Working Time

I'm using hide glue on this 1st build. So far I've glued up the kerfing, back braces, and the top "X" brace. I'm using the 190 grade glue. Working time is short at best. I heated the top "X" brace surfaces (brace & top) with a blow dryer and that seemed to help, a little. How can I get enough working time to glue the top, and then later the back, without having to rush and creating a real mess in the process? Suggestions and reco…

24 replies
24 replies
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I make a "hot hut" out of my go-bar deck by draping a large piece of vapor barrier plastic over it. Use clothes pins, or spring clamps to clamp areas shut around it. I then place a small space heate…
Private member DiscussionAcoustic Builds

Back Braces Shape

So the first real "full build" I'm doing is a Stewmac 000 kit. I was wondering about the back brace shape. I'll was planning to taper the ends at the side joint to about 1.5mm. Should I do some scalloping of the braces? Suggestions and comments are welcomed and appreciated. Regards, Gerry Images

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There's nothing "wrong" with what you have pictured but it lacks some finesse. There are soooo many variables in play to worry about for a first build. If you want to practice some skills in this st…
Private member DiscussionTools and Jigs

Tool for shaving back braces

I am retopping a guitar and while it's open I want to reduce the mass of the back braces. Since the sides are in the way, I can't figure out how to cleanly cut the excess brace wood away; anything I've tried involves the handle hitting the sides and preventing a controlled, clean cut. Is there a tool - say a "pull finger plane" - that I can pull from the edge to the middle of each brace to facilitate this?

6 replies
6 replies
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My problem in this parlor guitar is that any chisel I currently have is too long and I can’t address the middle third of the brace without coming in at such an angle that I can’t control the chisel pr…
Private member DiscussionAcoustic Repair

Repairing small instruments

Im 6'-6" with hands to match. I can squeeze my hands into most flattops, but a friend asked me to look at his 1930's Tiple. It has multiple back cracks that I can get to with props and TJ's crack system, but there are also plenty of loose braces. Looks like I've got to pop the back off, but I feel the long back cracks should be stabilized first. Would you hesitate removing the back? or is there a way to address the loose braces from out…

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Ian Davlin
Those are pretty small, but I think you can get those glued with sound hole clamps. I would at least try it before taking the back off. Take all the hardware off a sound hole clamp and flip one of the…
Private member DiscussionAcoustic Repair

Gibson L-50 archtop with loose back braces

Anyone have success re-gluing back braces on a Gibson f-hole arch top? I've got an L-50 in the shop with very small f holes. My jack braces won't even fit through the holes. The back is flat like a standard guitar with transverse ladder bracing. All 4 back braces are loose on the ends. I think I can get a go-bar on the lower 2, but the upper 2 will be very difficult to reach. I'd rather not take the back off if possible. I wish I h…

4 replies
4 replies
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Ian Davlin
Do you know the move of flipping the the feet on the bridge gluing clamps to do tight to get to back braces ?
Private member DiscussionAcoustic Repair

Harmony H167 Neck Reset...

Hey everyone, recently I've been getting more requests for neck resets from customers, and up until this point I haven't been offering them since I don't have the practical experience. I'm keen to change this, and I've borrowed my fathers Harmony H167 that has seen better days. I've done an initial cleaning and assessment, the truss rod works although I may need to force it into a backbow to have a fully adjustable neck. This shouldn't…

5 replies
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Also you have to take into account how much flex the top has. If you could set the neck dry then clamp it and string it up you can start the calculations about how much you to take off of the heal. In…
Private member DiscussionGeneral

Is this hollow body guitar worth fixing - sunken top…

I recently picked up a used custom guitar that the seller said he bought in Vietnam Nam many years ago. I bought it as a wall hanger due to the wonderful Mother of Pearl work, especially on the back. It was very apparent that the top on this instrument was sunken at least 3/8 of an inch, as the weird bridge setup was heightened to the max and there was barely any action height. Once I took it apart and removed the foam inside, I was…

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Ian Davlin
01:53:25 Q9. Vietnamese Hollow Body Worth Fixing? @member your video sir.
Private member DiscussionElectric Repair

ES-125 concaved top and loose back + braces

Hello, I have on my bench and es-125 with a concaved belly in the top where the bridge sits, I was able to fit a feeler gauge under one of the braces in the area, the brace above the bass side. The back of the guitar is loose for a stretch of roughly 5 inches. My thought was to take off the back and address the braces and somehow address the warp in the top. Any thoughts on how to unwarp it or better approaches to the whole job?…

3 replies
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Ian Davlin
Some times the plates come off of those old gibsons really nicely. Is there any evidence of someone trying to glue anything back together previously ?
Private member DiscussionAcoustic Repair

Repairing braces that do not close against soundboard

Hello Friends, I've had a vintage Epiphone acoustic stored at the shop for almost two years and it's about time to wrap it up. That never happens, LOL. It has a few loose braces, which is a repair I've done in the past. The problem with this one is that no matter how I jack up the loose braces from the inside, some parts of some braces simply do not move enough to come in contact with the soundboard. This is happening in a couple…

3 replies
3 replies
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Ian Davlin
00:23:28 Q3. Re-gluing Stubborn Loose Braces @member your video sir.
Private member DiscussionAcoustic Builds

Using Maple for Back Inside Center Seam

I just read a small note in a new OM plan (GenOne) I'm using that suggested maple as an alternate wood for the inside center strip between the back braces. Wondering what would be the downside of that (passive back). A curly maple strip would certainly be attractive, and the mass/ stiffness difference is virtually negligible for a passive back. Thoughts? I'm cutting braces this week...

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Flat sawn maple is what all the old Gibsons used for a center strip from the 1920's to the 1970's at least. They are something like .900in wide and .040in thick. It had to have been offcuts of their m…
Private member DiscussionAcoustic Builds

Steam Box Idea... What's wrong with this idea?

Speaking of Trevor Gore... I've started using falcate bracing on my ukuleles and in making the braces, 3 strips of .0625" spruce are bent and then put in a bent lamination glue up rig using epoxy. Bending spruce is no fun on a hot pipe. It's slow, fussy, the fibers want to delaminate. I have been thinking about building a small dedicated steam box. Pulling all 3 of the strips out at once and bending them over a form with a metal back…

7 replies
7 replies
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Ian Davlin
I tried it once for trying to bend mandolin sides. This was in 2006, back when the internet wasn't nearly as useful as it is today, so the attempt was pretty incomplete I think. If I remember correctl…