A problem you may have discovered is that, with any curve at all set to the X or Y joystick axis, your trimmed center position won't match where your MSFF2 joystick's physical position is. i.e. you could set full UP trim, but your MSFF2 stick won't be all the way rearward like it should be.
It's really bad with helos and using force trim to set the center position. You'll move the stick to a position, hit force trim, then the joystick will want to pull to a slightly different spot.
The only options for now are:
deal with it as is
avoid using any curve
make yourself a joystick extension to match the real plane's stick length to avoid the need for curve in the first place.
