I know that the description says that the p-51 by hangar-9 has flaps that come in 2 set positions and may be upgraded at a later time.Now does this mean you need to put in an additional servo, causing you to have to buy a new radio and receiver. Or does this mean they have an extra channel on the radio. Please help I am considering buying one of these. I already have the nexstar, but I am seriously considering buying one of these things. Last week at the field I flew this thing and man was it cool. Spins,loops, anything i put it through it did. I am still sort of a beginner so i am taking small steps up. I think its a good idea. So please help.

Thanks,
stunner