I agree with Dave regarding the air retracts. I've had mine since Global Jet Club got them in stock, have worn out one JetCat P-70 (80+ hours!) and now have a 2nd P-70 in it, with well over 400 flights and have not had any issues with the gear at all except for one item to watch for. On mine, the pin that holds the trailing link part of the gear works it way to one side or the other no matter how tight I try to get the set screw, but other than that, no problems.