Thanks zooland, I called horizon-the dude doesen't know much-thinks it is mechanics-I don't think that's the cause but will doublecheck. Antenna is in original location, will reroute with tube that I have. I do get glitches indoors only in nose-in hovers which i guess is caused by the way I'm pointng my transmitter antenna. I was afraid it was issue with tx or rx. I will try disengaging motor from main gear so i can run it without spinning the blades and if determine if blade pitch changes without changing throttle. Will that be hard on the motor-running with no load? How do you get Horizon to replace parts-do you raise hell with them?