Here is what I did which so far works --after setting up the INHs on setup screen
mix in 5(or 6)--elev>Aux2 then hit 100% and 100%
Now back to rev screen -and rev aux2
thats it
the two channels are locked as a siamesed setup
This is also for me a must:
place both servos on a bench with arms facing and almost touching.
weight servos to prevent moving
Run servos thru entire throw range -with and without any expo
the tracking should still be absolutely identical (always happens for me)
install servos in model and DO NOT change any mix or sub trim or anything!!
adjust linkage till servos hit end points together and are centered together
This PROOF method , proves linkages and electronics are identical - If this is too much work - just forget it and do it your own way - but this way will assure perfect tracking under any loads.