Quote Originally Posted by DaveB View Post
Thanks Pat. However, what I am seeking is different than solely the exterior dimensions. I need to be able to measure any dimension on a part. It would be great to be able to do that within SD3, but that feature is not in there. Autocad Inventor has all the dimensioning capability, but seems unable to load an STL file and do anything with it. Tinkercad can load the STL so that one can work with it, but its dimensioning tools seem only marginally functional to me. not sure which one I will try next, maybe Fusion 360?
123D Design has a measuring tool that works on imported STL. It's quirky but might work for you.