Are these a set of A and B? Just about had my V3 dialed in yesterday after about 8 flights then it started where it would be OK on minuet then the next I had tail spin again. Had to keep adjusting the 4 in 1. Found out the main drive gear for the B propellers was about stripped and was binding. I have one ordered. My biggest problem is the only place I have to fly inside is not real big. But I am getting better.