I wonder if you can answer a question regarding supports and how Autopipe applies them.I would check this myself but do not have access to Autopipe.
Say we have a pipe that has a slope (i.e. it is not exactly horizontal) and it is supported. In Autopipe you specify a vertical restraint at the support points. Now my question is does Autopipe "adjust" tha action of the vertical support such that it is perpendicular to the pipe (i.e. not truely vertical) or does Autopipe just apply a constraint in the true vertical direction?