Just a tip for fun.

i made an expression knob out of an alpha 5K log pot, some microphone cable and a TRS jack to connect to my Pitch Fork, so i can change pitch on the table without having to bend down. Awesome.
2K linear might be better, though, 5k log only work after roughly the half of a turn. Someone will try it out

Wiring
Tip to wiper
The other two to the sides. Swap them to reverse knob direction.

See attached image as well.