This is great for small pots that don't need a big knob, or for bringing out internal trimmers.
Use a Bourns 3310 series 9mm panel mount control. Instead of a knob, slip on a vinyl toggle cap normally used for miniature switches in various colors. They are 1/4 watt too. Caution, don't over tighten the mounting nut (shaft is plastic). The leads bend easy so secure wiring well.