Ok..Just started flying my Tango with a Magnum 70 4 stroke, plenty of power, and I must say I'm a little dissappointed over all. I'm using a 2500 MAH flite pack battery and originally put the pack right under the tank which proved to be a bit on the nose heavy side after flying it. I moved it back about maybe a half ahead from the spar, some better but still not the performance I'm wanting. I have LOT's of throw in my rudder and elevator, enough to make any other plane do some awesome snaps, but this thing just wants to "wallow" through them. Roll rate is fine. Any thoughts?