Flickr Dave
Slot in Pot Knob.
Not only did I trim the knob flush with the collar, I cut a little slot across both the collar and knob. This is to help the epoxy lock the pot's shaft in place. Ideally this slot make a straight line when the pot is in the centered position. That's why we made the effort to line it up before trimming it.
I used a dremel rotary tool with a cutting wheel to trim off the knob then make this slot.
[Actually using superglue instead of epoxy is recommended on these plastic parts. And the slot is pretty much unnecessary in that case.]
Slot in Pot Knob.
Not only did I trim the knob flush with the collar, I cut a little slot across both the collar and knob. This is to help the epoxy lock the pot's shaft in place. Ideally this slot make a straight line when the pot is in the centered position. That's why we made the effort to line it up before trimming it.
I used a dremel rotary tool with a cutting wheel to trim off the knob then make this slot.
[Actually using superglue instead of epoxy is recommended on these plastic parts. And the slot is pretty much unnecessary in that case.]