A neat slide dual 10K potentiometer on AliExpress.

Name: Behringer B10K pot.jpg Views: 153 Size: 193.7 KB

If you thought the 2 pins on the far left were the wipers, you'd make the coolest short circuit that can fry lots of gizmos. The wipers are on the right; they don't have a pin lined up with them on the far left.

Fortunately I tested each circuit as I was soldering them. Of course this pot was the last component I installed on the board. So now I have to scratch out some traces, and jump with wires.

Teach me right. (heavy sigh)