Just a quick tip: If you use a stereo potentiometer with PC (printed circuit board) pins termination style, for example this one, then you can just plug it into a breadboard and it is very stable, perfect for prototyping. No need for soldering wires or any extra breakout board. The 2 potentiometers are in parallel, so use a 20 k pot, if you need 10 k.

This image shows a similar potentiometer, I can't find the exact same model, but the datasheet of the Bourns potentiometer shows (nearly) 0.2" pitch as well, so it should work the same.