Looking for a 10 position rotary switch that all positions are functional. The ones I have now only 9 positions work trying to use the 10th position stop for a selection.
You can get a 3-stack switch, disassemble it and rotate the third switch contact 180?. If they aren't available you can take longer screws and a piece of (I think it's) 1/4" key stock and assemble it into a 3-stack with the third tier rotated 180?.