The Hub

I did some testing of peel strength for ABS plastic/unfinished wood bonds using various glues. I found some interesting results and am continuing to test with additional glues and an improved method. TL;DR: Non-aqueous glues as a class outperformed the aqueous glues Testors 3505 and thin cyanoacrylate provided the strongest non-aqueous glue bonds Among the nontoxic water cleanup glues, Canopy 560 glue exhibited a significantly higher mean p…

Hi, I just saw the Trussrod repair/ new fretboard post by Dan Erlewine and Rodrigo Gomes. I really liked it, especially the idea of carving the fretboard with the table saw! I could not comment on the article. I am sure there was a reason for replacing the whole fingerboard in their case. I wanted to document an alternative method that I tried two weeks ago with sucess. I did not invent it though, i have seen it somewhere in the interne…

Lyon and Healy Parlor repair. Is there any good method to soften/release old hide glue and re-clamp to close the gap? The braces will be removed and new X bracing installed. This appears to be a very old repair using hide glue, but it wasn't quite closed up at the time of the original repair so the crack is still open. Its holding very well and we may just leave it. But wanted to run this by the group. Looking to perhaps steam it along t…

Hey guys, I’d love to get some suggestions on how to finish this repair aesthetically. The customer brought it in because this piece had split while trying to remove the saddle using a rubber mallet. My main concern is that the joint between the two pieces of wood is still visible. I was thinking of doing what I’ve always done: using wood dust mixed with CA glue or Titebond. But I was wondering if you guys use a different method that migh…

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…

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…

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…

I am working on a neck reset on a Washburn Parlor - SN 283552. I have read that the 28 in the SN indicates that is was built in 1928, but the owner thinks based on her research that it was built before 1920. I am assuming a dovetail joint and that I can get into the neck joint for steaming by drilling into the 13th fret slot, but if anyone knows differently please let me know. The fingerboard extension has already separated slightly…

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…

Hi all, new to nut slot work world, please can you help me with this mystery? fret levelling, neck relief and string action adjustment all completed to Fender 9.5" radius spec. very happy with that. the next step: 0.011” High E string’s nut slot was a bit low. I used Dave Johnson’s (MI Guitar Craft Academy) “q-tip slot raising method”: the pulled cotton strand, plus extra thin CA glue, to fill the slot, then trim it off once dry,…

Hi everyone, I'm Martino from Hub of Acoustics, a collaborative project created by luthiers for luthiers. Our goal is to explore and teach acoustic principles that are directly relevant to instrument making. In 2026, we’ll be running four courses in different parts of the world, all focused on giving luthiers practical tools to better understand and control the acoustics of their instruments. We’re excited to introduce our very…

Hi to everyone does anybody knows about products related to the setup. I mean cleaning products that you can use instead of only use the Maguires products or any other products related to the cleaning process. For example I usually use the yellow shampoo from maguires and also the Triplex Carnaubba Wax from the chemical guys. Any clues ?

Hey all, Anyone have any go-to methods for making new replacement bridges look old? I’m about to make a new bridge for a relatively beat up 40’s Martin and contemplating ways to make it look more the part. With the replacements I’ve made up to this point I’ve always just sanded em real smooth, micromesh, oil, wax etc. I’m thinking maybe a wire brush prior to sanding for that shrunken grain look? The new bridge will be Indian rosewood. T…

Need some guidance for binding repairs. I'm using the "Martin method" using CA glue and tape for re-attaching the binding. From there: Scrape glue 400 grit to level Brushing on Lacquer 400 grit to level Meguiars #1 Meguiars #3 Meguiars #7 All by hand. But I recently purchased a Proxxon hand polisher. I'm still getting big marks. Its usually "ok", but I'm noticing huge swirls. Not pro. I do not have the money/space for…

I'm fast approaching the finish coating of 2 acousitcs. The sitka spruce tops are really bright. I'd like to tone them down a little and have been scouring the web for methods. Seems like adding amber toner in either the sand sealer or more likely the first set of nitro lacquer coats might be the the ticket. I see Stewmac has a Colortone stain called "Vintage Amber" that can be mixed into the nitro. Anybody have expirience with this pro…

I cut the fret slots for a baritone guitar build today, so I thought I'd share my method for cutting fret slots, as I think it is a bit unusual. I radius and profile my fretboard before I cut the slots. I print out a paper layout of the fretboard, double-stick tape it to the radiused and profiled fretboard, line up the saw by eye to using red hatch marks on the printout, and saw the fret slots with a 3" circular saw that rides on…

Hey all - I've got a couple Gibson headstock repair investments that I'd like to practice inserting splines for reinforcement (or I may go the backstrap method..tbd). Do you have any jig recommendations or preferences? I've only seen the G&W option (which looks awesome), several ebay knock-offs and lots of DIY jigs. I welcome your feedback. Thanks and all the best, Chris

Hi, I have a 1950's Gibson LG-3 that's had some poor work done to the spruce under the area of the bridge where the spruce has pulled away and or been sanded excessively. It's missing about .020-0.30 thou of spruce and I'm wondering/looking for advice about how to go about splicing in a thin piece of spruce before I re-glue the bridge. Please see pictures attached. My main questions are: glues for the patch, should the patch be mitered…