Video showing a simple way to modify those cheap, non-adjustable, run of the mill CTS etc rotary wafer switches for fewer positions. The one in the video is taken from 6 positions to 4 positions. I don’t know how many times I’ve dug through the switch bin and only had switches with too many positions on hand.
https://youtu.be/p4hz6c_VRJ0
https://youtu.be/p4hz6c_VRJ0