I have a T9CHP SUPER transmitter and I have recently had what I believe to be a progrming issue. For some reason the throttle and elevator sticks have switched functions. I flew with it a week ago with no problems then yesterday i tried to set up two new models when I noticed the problem. I tested the previously good model and found that the two sticks have apparently switched functions (the throttle stick is now operating the elevator). I'm not sure if it's something I have done or not. The radio has never been serviced and I was wondering if it might be a known issue, a radio i've been using past its service life, or possibly just needing a tune-up. I really hate to see this radio go as I'm quite taken by it's fuctionality. I purchased the radio new about 4 years ago. Any help would be welcome.