Guitar String Winder - Drill bit

I tried thing:825681 but it didn't fit (on both sides, drill and Guitar). So I made a similar one that worked great for my Yamaha SLG.

Maybe this one works for you as well. Additionally to the stl I added the Fusion 360 file, so you are able to modify it to your needs.

I printed it 100% infill, PLA, 0.6 mm Nottzle, with no support, but if esthetics are your thing, use support ;-)