I was lucky enough to find a very slick control knob at the junk-yard today.
It is a joystick from a forklift - cast aluminum with TWO momentary one switches built it.
Perfect for both a kill switch AND a push-button start. Plus, it gives the feel of a jet-fighter!
Sorry no photo. My camera batteries like to die at exactly the wrong time.
Will post one later.
Edit: Hey, just remembered I have a web cam!
Cheaper than
THIS and at a much better price.