I have a Showtime 90. I've had several different motors in it, SPE26, CRRC26, OS120AX , YS110and now a Evo26. I havn't flown it with the Evo ( waiting for good weather) but the other 2 gas engine were NOT enough power for 3D. The OS120AX and the YS110 were similar in power, both have very good power for 3D. I did not have any balance issues that couldn't be solved by rear mount rudder servo and moving battery around.