I have actually done both the air and the mp. I used the 4hawks sr. Installed them both myself. The mp seems to have produced the most improvement. Because the environment that you fly in is such a large influence, you may get different results. The portability of the rc also becomes a part of the decision. I modified the swing bracket on the sr unit to allow it to fold more than what comes out of the box. After all was said and done, I have stock and modified for both units. I am looking at the maxx UAV unit also,but have not found a used one to purchase. I’m to cheap to send an rc in to let them install and they won’t sell me one to install myself.