I have a problem setting up my 12fg with the 14 channel receiver. I have an old Kangaroo delta airframe which has two independant control surfaces on each wing. The instructions say they must work in tandem as aileron/elevators, I think that the model is designed this way for redundancy. I have set the radio up so that the control surfaces work off channels 4;5;11;and 12 this way I can adjust each individual servo so that the throws match. I now wish to creat a condition in the radio so that the inboard surfaces can be drooped by a few degrees to act as flaps for take off. I cannot find a way to do this. the most obvious way I thought was to put some sub trim on the inboard servos, this does not work because the sub trip then acts on condition one and two. Any ideas would be appreciated