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Private member DiscussionAcoustic Repair

bozo B80/12 neck block clownery

in for some top cracks and playability issues, neck is underset by almost 1/8" with significant hump at the joint...just got the strings off and got a better peek under the circus tent and... how the what the why? i just... really I... ummmm....can anyone guess what is going on here? Tempted to hand it back over any half-measure foolery. Third Japanese built one in this year but I've not seen this sort of hijinx...

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Ian Davlin
This is precisely why Leo Fender developed the insideless guitar. A compromised neck block is super hard to come back from and when I see something like this, it leads me to believe that it's the tip…
Private member DiscussionDiscussions

D28 blowout

Hi all, I'd like to get some input on how to address this top blowout. For starters I own this, I got it as a project guitar, 71 D28. I'm not as experienced with acoustics as electrics and this is a big project but I got it to learn new skills and I'm confident I can do it with guidance. It had been stored in the case for many years under tension and was way too humidified. The bridge had pulled up I assume in stages. The center seam se…

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Ian Davlin
Chris, can I add this for the council of elders show ? Also, we are going to have @member on pretty soon to talk about a job about this dramastic. Here's a link to the live show co…
Private member DiscussionElectric Repair

Sad Old '71 Hagstrom Swede

Greetings Wise Elders and fellow seekers of the Looth Group! I hope you're all keeping well. I humbly beseech thee for thine sage wisdom and experience. I purchased a 1971 Hagstrom Swede. This guitar was basically put in a case and then forgotten about for a few decades. I felt sorry for the old man and have taken it in as a stray / project. I would like to get it playing again. There are many scars on this guitar, I have looked for as…

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Private member
Thanks so much Ian, much to consider. Your tip about the white glue is something I didn't consider at all.
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 DiscussionTools and Jigs

Bandsaw methods

After several years of fighting with my bandsaw blade jumping off every few inches of cut (it needs a new bearing on the top wheel), I decided to try something bass-ackwards. I put the blade on with the teeth facing the 'wrong' direction. Not only did that solve the problem of the blade jumping off, but it has made the cutting of pickguard material much smoother. Has anyone else experienced this kind of situation? Do you have any other…

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Private member
I just rebuilt an old Delta 14". If you want to replace the bearings, it's relatively simple. Supplies: --Bearings, say from Noma Bearing --Rubber tires, say from Carter --Home made block to tap in bearin…
Private member DiscussionAcoustic Repair

Martin DX 175th bridge reglue

I have a martin DX 175TH that is in for a bridge lifting. I did some research and it has an HPL top and a rosewood bridge. I have some gluboost gel on hand but I was wondering if anyone has a better suggestion.

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Private member
Here are a few tips for reglueing a bridge to HPL: 1. Clean off any old cyanoacrylate (CA) residue on the soundboard using "Super Solvent" or a similar product designed to remove cured cyanoacrylate. 2.…
Private member DiscussionFinish Repair

'60's Fender Newporter matte finish repair

I working through a long top crack repair on a c.1964 Fender Newporter and need to do a little touch-up on the clear coat. The top coat is matte over a do-do brown stained mahogany top, I'm guessing around a 10-20% reflectivity. Questions: 1. What top coat product did Fender use on these? 2. What should I use that has great self-leveling qualities and will melt into the old finish? <>

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Private member
I've decided to follow your wisdom, Ian, and it leave the finish cracks alone. It will be structurally sound again and look like it used to have a crack.
Private member DiscussionNeck Reset Database

2003 Fender DG-14SCE Solid Top Acoustic

This guitar does not have a dovetail. It has five dowel. Three in line and two at the top on either side of the truss rod. Remove truss rod nut before sliding neck straight out.

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Private member
I thought that is where I posted this!
Private member DiscussionTools and Jigs

Non-CNC cauls for Stew-Mac sound hole clamps

I don’t have CNC capabilities so I could not duplicate Dave Slimmer’s version ( https://loothgroup.com/loothprint/bridge-clamping-cauls/). Got a 12x18x1/2 inch HDPE cutting board on Amazon for under $10 (https://www.amazon.com/dp/B001D3LQVA), drilled a row of 1/2 holes about 5/16” deep with a Forstner, cut the HDPE into 5 sided chunks so I could orient by touch, and free handed the brace grooves on the band saw. The clamp swivel pads are 1…

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Private member
Yeah, I think the current concerns with microplastics is impacting cutting board prices.

GlueBoost vs Nitro drop fill

*Photo added* Ding repair on spruce top, 2015 Collings 0002HE #23701. What are y’all reaching for when repairing dents in nitro? GlueBoost fill & finish or drop filling with nitrocellulose? This is a well-used guitar; not pristine and the owner has reasonable expectations that the repair will not be “like it never happened” Bonus question: If there is bare wood, should I seal it with shellac to preserve the color before proceeding to fil…

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Private member
The coating on that 000 is a mixture of a UV poly base and nitro top coats. It seems that many of the deeper spots could benefit from steam applications. I use a paper towel, folded into four layers a…
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…

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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…

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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

Thoughts on Restauration Roger Archtop

Hey everybody, I should restore this Roger Rossmeissl Archtop. There is a lot of work to do. The owner is aware of the possibly-much-more-work-than-value situation. I am still thinking about how to aproach it, I want to start working on the guitar in August. It seems that there is not much warping in the top, few wood is lost. I do not know what happened to the guitar, but sometimes I hear a voice coming out the corner of my workshop mumb…

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Private member
Thanks Ian! There are no splines, I think it will be it s first real repair. Some breaks have old transparent tape that is already corroded into the finish. The customer said something like money is n…
Private member DiscussionAcoustic Builds

Neck block for adjustable neck -thoughts on design

I've built a number of classical guitars with an adjustable neck and they seem to gather quite a bit of interest, so i'm currently in the process of looking to refine the design and build. It's quite a simple construction where the neck is held together by string tension and hangs on a pivot. I developed a 3d printed "socket" which acts as the interface between the body and the guitar and allows for some fine tuning of the alignment of t…

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Private member
Not really answering your question but I've done a version of the Smallman/Gore joint (I think it's really just Smallman but whatever) on all my guitars (nylon/steel/gypsy). I'm not particularly conc…
Private member DiscussionAcoustic Repair

Splines: When are they necessary?

Question about splines: At what point are they necessary? My question is primarily regarding the crack to the left between the bridge and the sound hole as well as the crack at the upper bout that runs along the fingerboard extension. I have already glued them both and used the TJ cleats that run the full length of the cracks. I have already splined the lower bout crack that runs from the bridge to the binding as it was super gappy and d…

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Private member DiscussionAcoustic Repair

Local Thrift Shop Find: Gibson Ivory Top A3 Mandolin

A customer brought in a Gibson ivory top A3 mandolin. It's in good shape and has all the parts. He found it at the local thrift store here in Bishop. He wants it mechanically sound. Here are the problems: 1) Everything that comes into the shop has a shrinkage component and the effects of course very from instrument to instrument. This instrument is no exception and the results of that shrinkage, in this case, are severe. The top, ba…

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Ian Davlin
@member Man, sorry for the late reply. I would just keep on taking this mandolin apart until you meet serious resistance. I'd build a mold and just trim it until it fits and…
Private member DiscussionAcoustic Builds

Drum Sanding Tops and Backs - When and which sander?

So it seems that a drum sander would be very handy for many parts of a "build from scratch". There are a few out there that cost under $3000.00 that can handle wood up to 4" thick and are wide enough to sand a back or top after the halves have been joined. Jet JWD-22-44 open stand, 22"width Jet JWDS-2550 open stand, 25" width SuperMax 19-38 opend stand, 19" width SuperMas 25-50 closed stand, 25" width Questions: Any recomendations on the sa…

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Tom Krebs
I have the SuperMax 16-32. Works very well. I have experience using an older Jet model. A few things about the SuperMax: The paper changing system is much easier. The quick release feature to raise/l…
Private member DiscussionDesign and Testing

Incoherence between CAD and test-piece

Good morning everyone, I was taking some measurement on production necks with scarf-joint (13° headstock angle) to add some machining process with the cnc. I so recreated the standard neck blank feature (100mm wide and 20mm thick), then drawed the 13° angle. Everything correspond the to the real piace but two measurement: the startingcut behind the break angle is ''off'' by 20mm +/- as well as the cut on the bottom, still off by 20mm…

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Is it possible that the angle of the scarf joint is different from the angle of the headstock on the real piece? Could be a manufacturing quirk