I put in a brushless motor. I used a go brushless motor 14 turns connected Y. It seems to spin about the same RPM as stock. For the tail to work I had to use a servo Y adapter for the 3 in 1 also needed to use a Y to supply power to it. So far it is working great. I may drop it down to 13 turns for a little higher head speed when I get better at flying it.