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Private member DiscussionNeck Reset Database

1960s Silvertone archtop neck pull

Dovetail was 9/16” deep, and 1 9/16” wide at the back. 15th fret was 1 mm tail side of the end of the dovetail socket but a slight angulation towards the headstock landed in the right place. Hide glue, released easily. Nice everyday player, finish and binding beautiful, good spruce top, warped poplar neck.

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Private member DiscussionAcoustic Repair

Discoloration inside acoustic guitar...

Hey Looths, I have a 1980 Guild 12 string in the shop and while doing a preliminary examination I noticed this odd discoloration inside of the guitar. My immediate thought was water damage, although it hasn't bled through to the outside of the guitar and lifted the finish. I also thought of glue smear but I can't quite tell. Any thoughts here?

3 replies
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Ian Davlin
Could be one of those exploding gel humidifiers.
Private member DiscussionGeneral

When do you guys suggest a bridge re-glue?

At what point do you tell a customer that their acoustic instrument needs a bridge reglue? Do you do it when the corners are just barely starting to lift? Once it has begun to affect playability/tuning stability? Do you offer half-measures to save them money when the damage is not too bad (dripping in some thinned tite bond instead of removing the bridge entirely for example)? I ask this because a Godin acoustic bass just came across my…

2 replies
2 replies
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Ian Davlin
You've had better luck than me with half measures. I'm not sure why you're diluted Titebond worked, but the one of the unfortunate things about Titebond, is that you cant glue TB to TB. It could be th…
Private member DiscussionFinish Repair

My guitar got smashed.

It was attacked by a Martin Dreadaught on a small mountain stage resulting in a faceplant. The top is Redwood. I was able to get it to glue up fairly well and have done some splice and drop fill on the vertical cracks. I'm curious about suggestions for the deep cross grain areas. I am hoping to not re-shoot any lacquer and just rub out the finish with some Kovax dry sanding. It was never high gloss buff to begin with and it's a personal…

3 replies
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Private member
@member Thanks Ian, I also have some ultra thin fill&finish on the way. I will do some experimenting with it and see if it can help me out any.
Private member DiscussionAcoustic Repair

Martin D-35 with cracks everywhere!

Hello looths! Long time lurker, first time poster here all the way from New Zealand. I have recently acquired this 2008 Martin D-35 for a very cheap price ($1000 NZD - around 600 US!) it's dried out in a very cold environment and has two substantial cracks running all the way across the top, one large side crack, and a previous side crack repair that's been done quite poorly. I'm only about 3 years in to this repair journey and this is d…

6 replies
6 replies
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Ian Davlin
I thought I might add an outlier of an opinion here. I understand the temptation to close the cracks with higher humidity, but you're asking a lot of adhesives, reinforcements and human attention span…
Private member DiscussionAcoustic Repair

Bending purfling- need advice

First time making purfling to match a repair. Problem: couldn’t get it to bend without delaminating and cracking. Veneer is 6 plies using 4 of SMs 0.023” and 2 maple at 0.025” cut to 1 1?2 inches wide. Glue up with Titebond Veneer glue, final stack at 0.140” thick. Let it dry 2 days, cut a few 0.090” strips, then used some super soft just at the waist and despite going very slowly the strip skewed, delaminated and started to break plies. W…

9 replies
9 replies
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I've never used titebond veneer glue before. But when I make purfling, I use a polyurethane glue, like gorilla glue (activated by moisture), so I can use steam to bend the purfling to the shape I need…
Private member DiscussionNeck Reset Database

1965 Stella

This guitar appears to have been assembled with urea formaldehyde glue, which is insoluble in water and doesn’t melt at any reasonable temperature. It is definitely not hide glue or resorcinol.The neck pocket is not under a fret slot. Luckily, very little glue was used to assemble the neck and it was all on the cheeks of the tenon and the neck came off rather easily using a combination of the StewMac heat rod and foam cutters, with smal…

4 replies
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Private member DiscussionAcoustic Builds

Nominal Normal Thickness of Barb Thickness for a .022” Tang Wire?

Let me start with this; I'm trying to find the root cause of difficult fret wire installation of two different SM fret wires. I've spent a lot of time gathering dimensions and experimenting with techniques wich could cause the problem. I enlisted the help of a colleague who arrived at a similar poor performance. His solution was to glue the fret ends/ beat the frets in. My "rather" is to find the root cause so I don't have to go thr…

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Private member
Matching the fretwire to the fret slots (and visa-versa) is a huge subject. Dan and I did an entire episode of the Dan and Doug Show just on fret slots. I'll be revisiting the subject of fretwork in…
Private member DiscussionAcoustic Repair

Gibson MK-72 Body Damage

All - looking for recommendations on overall approach for repairing this nasty side crack right at the edge of the tail block. My initial thought is that either the top or the back needs to come off in order to properly glue and clamp the main split. Thanks in advance. Images

7 replies
7 replies
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Ian Davlin
I use a file or a sanding block. I fit the new side by pulling sandpaper (like on a neck reset) to start and then finish with a little bit of chalk and futzing. You could pull the tailblock inlay and…
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…