>>but it's a pain :(

Don't hang your head, Jonah. Rhino is permanently improved. For example boolean operation in V3 doesn't work with objects which haven't intersection (e. g. cylinder on cube) or have singularity lying in the corner (e. g. cone and cube). And V4? It works. So be patient and importunate contributor of rhino newsgroup as well.... hehe..

Another pretty thing is that MoI makes Rhino's command _MergeFace automatically when you perform boolean operations. On the other hand, I feels the lack of _ShrinkTrimmedSrf. Maybe I have got a bad habit, but when I use trim command or boolean operations intensively, the underlying untrimmed surface doesn't look like a masterpiece.... although I rarely render my work, so I guess it doesn't matter it.

Petr