I put a Supertigre 45 on mine for the same reason. I never changed reflex, just checked balance and trimmed in flight. Plane is VERY fast. I was running a 9x10 APC which is an awesome combination. calculated to about 125 mph.

Plane is very twitchy though, negative expo helps, especially on inverted low passes.

APC's are quite brittle though, and break on landings much more than Master Airscrews.

Give it a try, you'll have a lot of fun with it.