Im not sure about the 14-7. Its ok but it doesnt make the plane perform as good as the sebart katana30s with a 14-7. The AJ is a bit wild with the 14-7. so much torque it makes it a bit of a handfull in the hover. imo its impossable to fly this bird indoors on a 14.7 yet the seba katana 30 is sweet indoors on a 14.7.. Must be the 32class dualsky xmotor on the aj that creates way to much torque on the larger props. The hacker 30-14-L on the seba dosent create such problems with torque. Check out the vid of the AJ with the 12-3.8 indoors.
http://www.flyinggiants.com/gallery/...0S_Indoors.wmv In this case larger props make for bigger problems. This may sound odd from a big prop junkie

But its true