I am going to place the ignition battery and kill switch in a cooler place to see what happens(behind the firewall box). It might be that the battery can not cope with the demand of the ignition when the place where it is now, gets hot. The engine has good cooling, but where the battery is, is very close/exposed to the engine. I have not so much place in there. You can see at my gallery, that is the plane...Also I might consider to place a Ni Cad ?, so it would deliver more map to the ignition in a shorter time. I have a Ni M. Sounds ok????