Hi Rob,

> I'm sure those who get confused by the polygon/ NURBS
> differentiation will be able to work out why booleans aren't
> working on their STL import ;)

Well I know for sure from my previous experience developing and supporting Rhino that a lot of people will not be able to work that out, it's an easy thing to get confused about.

I think the confusion may be reduced if I can figure out a good auxiliary place to put the import, like under some kind of "reference geometry" section or something other than the regular file import... I'm not sure where that would be yet though.

- Michael