My F1 is having an intermittent issue with the elevator trim. It works fine when switching it to nose down trim but is intermittently not moving in the nose up position. I have Infinity stick grips and I suspect it is either the switch or relay board. Mine has the little round knob on the stick for the trim adjustment. Does anybody know the part number for the switch? I also need to find out where the relay board is located. Is it near the actuator motor?