Hi dick, I'm sorry but maybe i didn't make my self clear. I was talking about It's pitching tendency's in Knife edge flight. I was under the assumption that an aerobatic plane like the Edge would have very little coupling in knife edge flight, and mine pulls really hard to the belly and rolls out to the left when top left rudder is applied. I can easily dial it out within the radio but i believe this would just be masking a bigger problem.

I flew it last with the CG at 4 1/2 from LE which was 35% of the MAC using your recommended calculation.

I built 0 degrees of incidence into the stab compared with the wing,and all control surfaces are straight and true. I love knife edge flight and love to do all the low knife edge maneuvers like loops, snaps and circles, but i must have very stable and reliable control without holding other controls excessively to do so.

I basically was asking for your info Mr. Hanson because you do have the same plane and engine combo as I, and your experience with models is well noted here on RCU.