RE: Vtail mixing -JR8103?
Like Jacob says, the 8103 has v-tail mixing in Glider Mode. The spoileron channel works the same as throttle. Do check that the mixes are turned off in Glider mode. It seems that there is an aileron-something mix on the Aux. 3 knob that the default setting is on. In other words, you turn the knob and it adjusts your aileron trim.
Paul