I have had 5 glow engines since I started flying, an Enya 40, Irvine 46 MkIII(red one), SC 46, SC 53 and an OS FP40.

I can honestly say the Irvine has been far and away the best engine, as one of the other guys said, put one tank through it on the ground, and then refueled and flew.

Been flying it since last November, and NEVER once had a dead stick, superb engine!!!