also X52PRo.
My only throttle control is the axis of the X52, no other buttons mapped.
For pitch i have two versions on my X52 throttle : the forefinger hatswitch to fly the 109/110 and the thumbwheel to fly all other aircraft.
when i change positions in german aircraft, the engine are loosing power for a short moment (one can describe it as a 'hiccup'

), but the Blenheim engines dont "survuve" this, they quit. The german ones keep running.
and to repeat, i have this proplem only in Multiplayer, in Singleplayer not