Can somebody shed some light on this please, I think I might have missunderstood this concept. As I have understood how this works is if you have your pushrods physicaly modeled in the correct angle, as it is for example in the USF2000, the spring/dampermults are not needed. I just skipped through the hdv of the USF and I noticed spring/dampermults are used aswell. I assume I understood this wrong then? That actually now is quite confusing as I have played with this for a long time now with quite satisfying results at times using different methods (vertical modeled with calculated ratios).