If you use a strap, do you use 2.4GHz? I found that, when using the strap on my Spektrum DX7, when I let go of the thing, not when I'm flying of course, but when I put it around my neck at first, the "center of gravity and the strap position on the transmittter causes it to point the antenna right at my chin, and causes the sticks (most fearful of moving the throttle when I don't want to move it) to move when the face of the transmitter hits my chest.

The LHS (yeah, the one that closed last year) had this aluminum gizmo that screwed into the hole on the front of the transmitter that offset where the strap connect and allows it to be better balanced.. so that it doesn't do it anymore.

CGr.