I first got my FW-3Dand put a saito 180 on it w/ a 16-8 .. it would jump off the ground in 5', hover at an idle, and was a good flyer at idle. the 3rd day of flying it I went to a Thunder Tiger 91, w/a 14-4.. and got a lot better feel of the plane.. would still take off in 40' and hold, drop, and climb out of a hover (not like a rocket but good)..knife edge is non existant but I could get an inverted flat spin. Also the tailfeathers are stock (w/out counter balances) I think that mod. would be a plus...spins are hard to get into and hard to hold w/my power plant but it is a blast to fly and as stated by others, dragging the tail across the ground is a "RUSH!!!" I THINK I'LL KEEP THIS ONE!!!