I think the nitro is probably the trick. It's hard to get into seriously hopping up this four stroke, as it is pretty limited by design as to horsepower potential, and modifications on it are anything but easy.

The 6900 or so rpms I'm getting on an 18 x 8 prop will probably fly the SR Batteries Giant Eindekker I'm building for it, and it will sound really neat on that plane, but I would like a little more power...

Thanks for your thoughts,
AV8TOR