I'm looking to upgrade my ultra micro champ. Ive gone thru and reinforced everything with carbon fiber rods and now im looking to upgrade the motor. i was told that i could buy the p51 mustang motor and install it in the champ since its the same size. But when i went to the hooby shop they couldnt tell me if the p51 motor was faster or not. or if i heard that because the gearing was differnt in the p51 than the champ. any experience or info on this would be great