[jofer]

Thanks!

I erred on the side of too thick walls instead of too thin, as I was a bit worried about durability. They're thicker than they need to be, though. It would definitely drop costs to make them thinner.

As far as clipping along an arbitrary border, it shouldn't be difficult. I haven't actually made a model with a non-square border yet, but I've been meaning to for awhile. I probably won't have time to in the next few months, though. If you give it a try, let me know how it goes!