James, I like your suggestions.

I spent a couple of hours trying to modify curveFillet, using Michaels code, but the crvFillet.js would not work.

Here is a (non-functional) crvFillet.js node, (to be placed in the nodeeditor extensions folder, which adds a node to curves2 menu.

I did not try yet to implement the sel (selection) mask input.
I have confusion between Michael's objs, crv, and c1...

- Brian