That's really interesting! A whole different concept for adjusting tension -
Those remind me of the fine tuners on a violin. And if they work like fine tuners, you can split hairs upon hairs when tuning.
+1
They also remind me of the tuners on headless guitars and basses (where the tuners are actually at the bridge). Those are finely tuned as well, so if you've got your action and intonation where you want it, these tuners will be awesome.
Didn't think of that.They will not work for nylon strings...too much stretch factor.............