I run a 12-6 APC cut down to 11 with the tips left square on my Magician. The ones I have seem to like a load. They fly the whole pattern in a 4 with just a beep of 2 at the top of the circle. Very nice running motors for stunt. Mine are all stock except for aluminum head gaskets. Of course, my Magicians only weigh between 35 and 38 ounces.