I have an Evo .46 in my Twist. 1st, they say "engine broke in from factory. Basically no adjustments necessary". BS!!! The low end needle was screwed the whole way in. Engine wouldn't start period. I then took off the stupid adjustment ring so you could at least adjust needle. 2nd, use an 11x6 prop. Throw away the 3 blade prop.
I have 2 problems with mine. When you go full throttle, the rpms go up....but it sounds too rich. Then, 3 seconds later, it will hit full.
Also, you can fly the plane and then land with plenty of fuel left. Once you push up throttle to taxi back to the pits, the engine will die.
Thats if you don't gradually give it throttle. Weird engine. It runs a little better once its warmed up.

Dave...