I went to hobby haven the other day and decide to get a little hotter glowplug as my engine seemed to be bogging down off the line but when i left the igniter on it took of like a rocket! I was using a O.S. No.8. Two questions, what is everyone else using and what do i need to look for as signs of preignition? I ran my hurricane pretty hard and it seemed to run great to me but I just want to make sure.