[Ant]

Does anyone out there have any tips on any good suspension software, mainly for calculating roll centers and rack position etc?

Reason is I am going to either shorten my front suspension arms, or move inwards to allow clearance for slicks etc. I am contemplating shortening my steering rack, but would like to find a Computer program so I can input different data or positions of components and see how they work out.
Another way would be to make a half or full size cardboard representation of the uprights/ arms and locating points and pivot/roll the chassis to see where things end up!