Ibanez knob

thingiverse

Lower portion of a dual (stacked) knob such as for the Vari-Mid iii bass controls. The knob on one I picked up used was cracked, so I printed a replacement. (the photo is of an original lower knob which has a metal liner. The ones on my bass had narrower grooves, thus the smaller size on my model. Mine had a 2mm main indicator slot but the others were just 1mm in width. I didn't bother trying to figure out how to reproduce the liner or make an insert for it as it's too easy to print a new one or switch off between different colored knobs.) There is a hole for a screw and all holes are slightly undersized. So you might need to run a rat-tail file slightly up the center if you don't want to do a really snug, force fit. Instead of using an allen-style machine screw which had narrow and not-too-deep threads, I took a very small high-thread plastic screw I had on-hand with a <2mm head and drilled a small indent near the mouth of the hole so the head would not stick out. I also filed the tip of the screw flat and it seems to work just fine to hold the knob in place. This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/5uzDd4fkGsj