I ran these things for years, practically trouble free. I ran 7 of them into the dirt. I only switched because I needed more power for the upper classes and a much larger/draggier plane.

Here is the set up I used, fairly bullet proof:

OS F plug
Cool Power 15% nitro
OS header, standard length
ES 2C140M80 carbon pipe
EFI rear main bearing
16.5x12W prop for pattern, 17x10 for power, 18x6 W for 3d

Have fun!

-Mike