You know, I think you're right. I can swear I had 2 or 3 flights after re-installing the reg yesterday. Will the motor run with the reg installed backwards Dave?

As for which reg has the little nib, I can only speak of the 2 regs I have. The small off-center nib is on the older, large plunger reg, and the larger centered nib is on the newer, smalll plunger reg. I'm not sure if that is universally true, maybe Dave will chime in.

Kurt

EDIT: I added a pic with the older reg reversed compared to the pic in my previous post. Now the little off center nib faces the front of the motor.