It's a great model and prints well but its very small. This won't work on anything other than a Fender type electric guitar that has a flat headstock. If you scale it to 200x90x70 you will get something a lot more universal although still not for an acoustic.
PLA using the profile I provided above. Turned out great, make sure to print it on a flat side, no supports needed. May want to print larger if you are working on thicker guitars like semi-hollow, hollow, or acoustics.