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Seems to me I followed a link from here for a free 2D cad program that was pretty much autocad. I had to reformat and for the life of me I can not remember the name of it, any help would be appreciated.

From suface contact post

Hello all I am designing some tooling that will have a 7.938 spherical radius going into a 8mm concave radius. Is there any way Alibre can tell me what the amount of surface contact will be ?