tell ya what folks,i used an alpha trainer to learn, and i have purchased a couple of them that were destroyed in crashes,i have used the evo .46 on a couple other planes,a balsa usa phaeton2,and a sig smith miniplane,and got one on a WM P-51,my point....... take off the flywheel,press out the prop hub,put on the hobbico/tower .46 tuned muffler,or a pitts muffler ,put on an 11x6 apc,and enjoy. and,even though it will stir a stink,i will put any one of my evo .46's against an o.s. 46fx any time! they are very powerful and cheap to boot! later