The Parkzone P51D Ferocious Frankie is one beautiful bird so a geared brushless motor and Lipo upgrade not only improves performance but extends flight time as well. A 2815 4000 KV EDF motor was used as replacement. The metal pinion was soldered to the motor shaft and a round metal washer placed between the motor and the housing to strengthen the mount. By design the model needs a lot of air speed or it will stall. Get the "replacement fuselage" from Advantagehobby-dot-com and do the mods yourself. After some practice will come the rolls, Cuban 8's and low passes ... like the real Ferocious Frankie...