guitar tuners - geared string tuner version 1.1

check out version 2:

https://www.printables.com/model/473276-guitar-tuners-that-actually-work

Assebly demo: 

tested guitar string tuners. they work great for nylon strings, for steel strings, I'd say 80%-90%. they tune nicely, but break when the pitch is too high. so I would recommend them for nylon strings. I'll just have to make another improved version for steel strings.

IMPORTANT: the slots on the base, sleeve, and worm drive must all be aligned before inserting the locking pin.