ZETOR< make sure that your antenna is screwed in secure on th xmitter. A 6 pound bird should have 10 fresh rubberbands to hold the wing. Binding linkages can stall a servo, which can overload the on board battery. Radio interference is easy to blame, but is seldom the case. You could send your radio system back, and have the factory test it on a vibration jig, that is the only way to pin point a loose connection sometimes. Lastly, if you pick out a lighter plane next time, like a profile job that weighs 4 pounds, you will have less kinetic energy working against you in a hard landing, and an easier plane to fly and land, plus you will get way more enjoyment out of it. Just set it up with conservative control throws and a forward CG and it will handle like a *****cat!