I see. Well, generally speaking - that is undesirable with force feedback. Because a non-linear physical to logical position would mess up the ffb-effects (afaik). However - if it is the stick position in the forward trim that is concerning you, it may be worth considering to move the center point towards you, by manually changing the calibration value of the "push forward" position. I did that for the F-4 once, because it has a lot of forward trim and my arm was to short for comfort. Probably not exactly what you are looking for, but it may help to alleviate your problem.