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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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Private member
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?

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Private member
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 DiscussionFinish New Builds

Sanding methods/mechanism routine

Good evening folks, lately I'm experiencing some sanding methods/mechanism frustration. Can't explain better than look like I'm regressing at doing it. The only thing changed in my building routine is that I'm currently using a CNC (I haven't used one for some years) for both bodies and necks. I have no problems with necks, but sanding bodies has become incredibly frustrating, specially around the edges. While I keep improving my c…

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Private member DiscussionFinish New Builds

Tiny Bubbles

Here You'll seehere pin tip sized bubbles. Nitro finish. It got hot in a case. They'll need a light amagolmater mixture applied to melt'm back into the surface. Im looking for advice on the recipe for said amagolmater....Straight retarder? Im not sure if Id need lacquer in the mix that I apply....Thank you! Colin O'Brien LittleCreek Instrument Repair, Nashville. Images

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Private member
are those blisters from the heat? Have any of them popped?
Private member DiscussionTools and Jigs

Hackman Finland Wood Pecker chisels?

I picked up a set of these chisels a couple years ago at an estate sale. They were in a very sorry state but had clearly been used and loved. I gave them a good cleaning and sharpened just the smallest one, which took a very nice edge. I'm debating sharpening the rest in order to sell them along with my Narex chisels (which I haven't loved) and replacing them all with a couple Lie Nielsen chisels only in the sizes I really use. Anyone h…

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Private member
Hey @member the Narex chisels are ok. Out of the box they needed a good amount of sharpening and polishing, which I put off for literally years. But I finally used Rye Bear's method and got them to a…
Private member DiscussionElectric Builds

alternative to mixol?

Hey guys, does anybody know of a good alternative to mixol? I use it in lacquer for mixing opaque colors and it's great but I've been on the lookout for something more affordable and haven't had much luck. Wondering if anybody here knows of anything. Thanks!

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Ian Davlin
It used to be the colortone pigments from stewmac that were quite good and didn't require a ton of material to go to opaque. It seems like we are left with just Mixol for guitar grade pigments that wo…
Private member DiscussionCAD/CAM

Contriver Node Atlas

A visual dependency map for Autodesk Fusion. It turns complex Fusion designs into an interactive map of model logic, helping users understand how parameters, sketches, construction references, features, bodies, and other design elements relate to each other. Instead of digging through dense timelines, browser trees, and feature chains, Node Atlas gives users a readable graph of how a design is connected. It is built for designers, builder…

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Private member DiscussionTools and Jigs

Hide Glue Pot

Does anyone have a good glue pot they can recommend. I'm planning to try some hide glue work. Regards, Gerry

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Private member
I made this 3d printed top for a wax pot a long time ago, I think the links are there. I highly recommend keeping the glue in squeeze bottles, it keeps the glue uncomfortably hot all the way to the i…
Private member DiscussionDesign and Testing

AI hallucinations-Claude fessing up

I am working on an article to post here on the Looth Group regarding the history, and problems, with scale temperament. In the process, I asked Claude about a particular point, and Claude gave me a quote that perfectly encapsulated the concept I was exploring. I asked Claude to provide the specific citation for the quote. Claude fessed up to outright misrepresentation. Probably nothing new here, but I thought it was worth sharing.…

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Private member
There's a really cool book, not specifically about intonation but dives deeply into it, called Harmonic Experience by W.A Mathieu. Highly recommended. Cheapish used.
Private member DiscussionFinish New Builds

Wipe on poly over Z-Poxy?

Hello — I would like to finish a mahogany electric neck and body with wipe on poly (probably Minwax satin) and would like to pore fill with Z-Poxy. I can’t find a definitive word on their compatibility. - Can I just wipe on the poly coats after block sanding the 2-3 Z-Poxy coats? - Should the Z-Poxy be sanded all the way back to wood or just smoothed/flattened? - Is a coat of unwaxed shellac between the Z-Poxy and the wipe in…

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Private member
I personally like to do a washout of shellac just in case.
Private member DiscussionShop Organisation

How do you all keep track of your builds/repairs?

Hey all. I apologize if this type of post isn't allowed here but wanted to share anyway. I've been building a tool called Looth specifically for luthiers and repair techs, and I'm looking for a small group of interested looths to help shape it a bit more before it goes public. I got tired of managing spreadsheets and decided that it could be simpler and more automated. The core idea is simple: one place to track every build…

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Private member
I've got some great feedback on this app so far. Anyone else using something similar or different? What is working for your shop?
Private member DiscussionAcoustic Builds

Replicating Kurt Cobains 59 Martin - bad idea?!

Greetings fellow Looths! I recently received a request from a customer to replicate Kurt Cobains 59 Martin, starting with a Sigma DM3. I have pasted the customers email to me below. While I have been a looth hobbyist for many years, I just recently opened my official business, Finger Lakes Guitar Works, and am just getting off the ground and a good flow of repair work is already coming in. While I feel 100% confident in my abilities to…

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Private member
Seems kinda annoying to me. The guy wants to spend a ton of money building a replica of a guitar but he's going to not use a guitar by the actual brand to do it? I'm going to go with this is going t…
Private member DiscussionCAD/CAM

“I live my life a 1/8 mm at a time”

Guitar neck topology is worth going microscopic. 🔬🦠 After building my starting surface from a wireframe network in the sketch environment; a system of 4-degree control point spline rails, tangent to projected isoparametric curves along the shaft — I can convert the NURBS surface to a T-Spline and start cleaning up the artifacts left behind by the original loft. In this demo I’m turning on Box Display, which feels strange at first because…

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