The Xmitter has a non linear throttle curve that simulates changing the arm length. This change and moving the landing gear back were done at the same time. Three successful take offs were made. The airplane did a bit of a dance going down the run way but it was controllable. Also rudder expo was increased to further desensitize its ground characteristics. It is still not as stable as I would like. So the landing gear will be set back just a bit more.