(2020-11-02, 18:24)Lasse Deleuran Wrote: Thanks Magnus. That clears it up, including why I couldn't make sense of combining primitives for 3/4 cylinders and such.
I learned about this myself recently—one of the many "unwritten rules" of LDraw.

Makes me wonder if it's worth gathering some of these rules into a single place—even just an indexed thread like they have at Eurobricks?