Don,
Thanks for the link. Nice looking switches! By "key", I mean "plug", I would hate to misplace the plug and be stuck looking for an alternative. Thats the main reason for choosing the pingle as it looks to use a simple cotter pin. That and I recall somewhere someone saying that the pingle switches are a known commodity (good quality), unlike the no name ones that can be gotten for $20 on fleabay.
Cheers
Alan