A 3D printable ongeki lever using 5/16" and M3 fasteners
Print at your own risk (my printer tolerance will be different than yours). I'm not responsible for wasted filament. Use the test prints to adjust scaling (+/-%) to get things to fit.
Designed to use this encoder 20mm Contactless Digitized Potentiometer 6mm shaft 0-5v https://amzn.to/3eXmKgd
Printed with 3 perimeters, top, and bottom layers with 15% infill.
--Uses 5/16" hardware --5/16" fully threaded bolt for the handle (5.5-6" long) --5/16" fully threaded for the pivot rod (about 3.75"-4" long) --5/16" nylock nuts (4) --608 skateboard bearings (2 of them) (8mm ID, 22mm OD, 7mm thick) --m3 bolts and nuts to attach the top and bottom clamp together. (35mm long) --m3 bolts can be used to attach the assembly to the controller body or #6 screws countersunk from the top of the controller going down into the lever assembly mounting holes. (Length depends on your wood thickness but I used 3/4" long screws.) --Dielectric grease
I didn't personally do this on mine, but you could put dielectric grease or something similar between the "tension chuck" and the "top/bottom clamp's" mating surfaces. Also, you may want to sand the "tension chuck" and possibly the mating faces of the clamps. Again, I didn't do this for mine. You can also add some sort of lubricant on the gear teeth.
If parts don't press fit in suuuuper snug, you could use some glue. Assembly should need no adhesives. Maybe a few drops of CA glue holding the top clamp to the body, but that's really it.
Print at your own risk (my printer tolerance will be different than yours). I'm not responsible for wasted filament. Use the test prints to adjust scaling (+/-%) to get things to fit.