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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…

Hey everyone, Recently I've been struggling to determine how much to charge the customer in regards to parts for a repair. The best example of this I can give would be guitar strings. Occasionally I'll buy strings on sale, other times when they're not on sale, and since cost of strings often varies, I may buy strings at the start of the year, and at the end of the year the price will be different. So the question is, what variables do I…

I've been testing all my top and bracewood to find the best combination of stiffness and density, optimize plate thickness, etc. I started with Nicoletti's spreadsheet which calculates both stiffness and density, but since I was also testing deflection, I decided to compare the flexural modulus using that method (with the formula from T. Gore's book) on the same plates and bracewood. Unfortunately, I'm having trouble getting a satisfa…

First time here on the forums, not sure how often I'll check in, but thought this the best place to post it. Was playing with an idea proposed by Buck Van Laarhoven on a parametric model for bolt-on neck shims, and found the formulas I wrote up translated easily to Taylor and conventional acoustic neck joints so decided to add boxes for those as well. I'm not well versed in Google Sheets, but couldn't see a way to upload the file direct…

For folks familiar with the Gore / Gilet books and the top thickness calculations in section 4.5. I made a web based calculator to do the nasty spreadsheet math... So this is for once you've weighed and measured your top plates and then found the long, cross and transverse resonances it gives you the target thickness to hit a particular frequency for the long resonance of the plate. Just sharing so folks don't have to do the math for bu…

Hi everyone, in the loothalong I shared this spreadsheet I put together a few years ago, based on D'ADDARIO phosphor bronze strings data, and Elixirs' as well. There are a few different tables for standard 6 strings, fanfrets, harp guitars, baritone and 12 strings. You choose the relevant table, input the scale length, string gauges and tuning, the spreadsheet will give you individual string and total tension in lb and kg. For the fanfret…

Neck Reset suite repair forms and spreadsheet. (Please share 🌞) Three new (and pretty cool) totally free forms on my website (http://www.beauhannamguitars.com/Lutherie-Resources.html) 1- The first form is a detailed explanation of the procedure taking into account top deflection (print one out for yourself to look at) 2- The second is the Neck Reset repair form to print multiples of and give to the customer. 3- The third is an Excel spreed…

@member @member I have a question for you. I'm starting to measure spruce for a couple of classical guitars I'm going to make. I used structured sides (I'm calling them cored) on one of my last guitars and it came out notably great. I accidentally thinned the top more than I might have and it seemed to work very well. My thought is that the sides are so stiff that it's allowing the top to survive structurally even…