Instead of selecting whether to use max or nominal dimensions to use in the model, how about incorporating the tolerance in our model. I got the idea but still exploring on method of how to do it. Can we assign tolerance to the model ...so that when we want to see the max model, the model will be regenerate and show the max areas it covers and vive versa? or create a box envelope surface which is using max dimensions and user can hide the surface to see the real geometry? Any suggestions?