Okay sorry for taking a while to get back to this. The holiday had me quite busy.

I am working up a video to show the workflow for this but it's a bit complicated as I need to point out quite a few potential issues.

Stay tuned.

Topics -

1. bevel plus extrude direction based on curve direction
2. thing that make bevel plus upset
3. nurbs trim and round
4. polygon and nurbs surface direction

Here is the result -

Some things to note. Because of the narrow script you cannot do much of a bevel at all without getting intersections which would give your STL application fits. So I had to pretty much bevel straight in.