Jan,

Sorry you are having issues, but I see a couple of clues here. I had a friend with a similar situation, and were were able trace it back to how he had set up his radio. He did not fully understand how to program his radio, and in his case , the flaperon and mix functions. He realized this and only flew with his switches a "certain way". When I got a hold of the radio the problem was obvious. When the flap switch was moved, he had unwanted surface movement. On top of that he had mixed the elevator to flap function so at some elevator deflections it would cause a gnarly roll or even a departure because it was on a multi point curve, so only was effected at partial non linear travels. This happened on multiple platforms because he copied the same "base" model for each new one. He just accepted these limitations as normal.

Could any of this apply to you? You said you are the only one who who flies JR. Have you checked for unwanted control interaction with the switches in all positions?

Red