I had the same problem with the thrustmaster hotas warthog. I assigned the airbrake switch of the hotas for extending and retracting. What I noticed finally is that if the switch is kept in the retract position, not the midle position, the trim pitch up goes to max, and is not possible to control the trim with the trim switch of the stick with the airbrake in retract position. I need to move the airbrake switch to middle position to regain control of the trim. Not a big deal, but I wonder if it is not a small bug.
By the way, congratulations for your great work. It's very nice to fly. I've two in my hangar to share flights with my little son !!
