In article
,
Vasil wrote:

I want to change the pot on my amplifier with one from Alps. The
problems is the only Alps pot that matches the dimensions and
resistance has a slotted shaft and my amp has a pot with a flattened
shaft. Is there a way to adapt a slotted shaft so the knob for the
flattened shaft can fit without a problem?

If the shafts in question are the same diameter, you can easily mill,
grind, or file a flat onto the slotted shaft.