I've had two of these planes (the first one had the ground leap up and grab it!). I've had a great time with them, but it was a new plane when I put on the 12.25X3.75 prop (TT46). Yes, the RPM's drop but who cares...it is not a speed plane, it's a FUN PLANE! Leverage out the ailerons and use high rates for "blur rolls", KE needs severe coupling, spins good ( but not inverted for me). That's my experience.
Jim