Hi Peter, yeah you're right and in fact I guess that mechanical solid modelers like SolidWorks and Pro/E often have a pretty similar kind of "feature library" type thing as well.

But again if you have the need to create such repeated fasteners quite a lot, then again I would suggest using one of those modelers that is focused very much on mechanical part design like SolidWorks, they will do a better job of that type thing in a similar sense to what I was describing for an architecture-oriented modeler being easier to use for architecture.

- Michael