Hi, Michael! I've been mucking about a bit with MoI again, and I like the progress a lot:-) I think I've come across a bug/weakness with the offset tool though. I'm trying to make a pot for a perculator. It's made with two sweeps for the top of the pot, and a revolved profile for the "body". Each piece gets offset/shelled nicely when separate, but when they're joined I get this: