Cutting slots for slider pots

[R.G. Keen]

The only good way I ever found that turned out consistent slots for 
sliders and was (relatively) cheap was to chuck up a small side mill
bit in a drill press ($200) and clamp the work into an X-Y vise ($50)
to make a poor man's mill. The X-Y gives you control and truly straight
lines. I've only done this in aluminum.

The problem with slots is that the slider does not cover them, so the 
slots need to look good as well as being big enough. I could never get
slots to be straight and parallel (for multiples) any other way.

R.G.