i have a pheonix yak and it will snap on you if you aarnt careful. if you are trying imac that 62 isnt going to be enough power. if you just want a plane to throw around, go vertical every once in a while it will be fine. however imac is a whole different league, i have a gms.47 on a gp rapture which by all means is overpowering it (slow but unlimited vertical). i tried flying imac and quickly realized i dont have as much power as i thought. you really have to learn to keep your speed up and not rely on the engine, which is easier said than done.