Hi Jovabra,
In order to let my DIY force feedback yoke work properly, I have to disable X-Plane trim effect in Plane Maker. So the trim dose not effect elevator position, it only change the neutral position of my yoke. That means, if I hold the yoke position, and trim. The pitch will not change directly, but the force in my hand will change.
Like skiselkov said, TBM 900 uses a completely custom trim implementation. I can not disable it in plane maker. That is my current problem.