Thanks for the info, but I have had the plane for awhile now, and love it. you were talking about a gearbox, best combo I've found is the great planes GD-600 gearbox 2.5:1 ratio a magnetic mayham reverse motor and everything I read, they said 11X7 prop. thats good, but I found thru playing with motocalc that the 12X8 is better!! goes vertical quite a bit, pulls loops , inverted, square loops damn near anything, also get these batterys!!!! direct replacement but 3000mah and with my triton charger, it tells me there charging up to 3400mah.
http://www.batteryspace.com/product.asp?3=69