How to keep pinion from falling off?

[ReV:-O]

Thanks for the replies guys.

I'm using a HPI Savage Flux pinion, as all the other pinions had the wrong shape teeth (including the RCM one) which made a very loud grinding sound (see my other thread).

Anyway, I'm using blue locktite which I believe is the removable one. I never thought of putting locktite on the shaft itself, i might have to try that.

I don't really wanna weld it on, because then it would be very hard to get off!