I'm using the Futaba 6CHP so I programmed in one of the mixes to be equal ailerons up as the elevator goes up. That way when I flip my switch and use up elevator the ailerons go up equally. If you don't have that on your radio, you can try the air brake switch and set it up so when you flip the switch instead of elevator up and ailerons down it goes to elevator up and ailerons up. I first did that by changing the aileron % to the opposite on my radio. I don't know a damn thing about your radio so I can't get that specific. If you need me to I can find out.
Also, skip what the CG recommends. I put my battery as far back as it could go, just short of the balsa wall and it did make a differance. I trimmed mine out at 1/3 to 1/2 throttle and it will stay level (except when the wind hits - then skippy)
Setting it up so both the ailerons and elevator go up together makes a big differance.
No matter what I don't know if it is possible to get rid of the rolling on it's back though. I'm gonna try a heavier battery when the weather clears to see if that makes any differance. I'm running a E-Tec 1250 now, gonna try a 1500 I have. I'll let you know.
RS