You know those spiffy mag switches where you turn a magnet off and on with a knob. I have a project in mind for some but I need a different kind of knob. I want to know if anyone out there has seen a magswitch without the knob. Maybe you have broken one or (better yet), you had some application where you needed to remove the knob for a special project of your own.

I have two questions before I go destroy one of these things:

1. What's the best way to get the knob off of a magswitch without wrecking it?
2. What does the shaft look like under there?

I do have a metal lathe and plan to turn my own knobs so I can handle a lot. But I sure would like to know what I am getting myself into.