When calibrating the ESC's I found that one of the ESC's is defective, and I just do not have time to order a new one from HobbyKing. So, my other option is to buy one from a local store. The problem, however, is that I did not find the same kind of ESC's that the 3 other ones are. I can find ones with similar specs, but just not the same exact one. Will that affect how the quadcopter runs?