Thank you Michael for the curve and chamfer information.

To further define fillet node and/or new chamfer node.
I had a look at Fillet node, (maybe Karsten made it?) under the construct2 menu, which has 269 lines, including about 30 commented out, and has the curve fillet factory input commented out.
The Fillet2 node under the r2d3 menu has only 47 lines, appears to have been derived from fillet node, and also has the curve fillet factory input commented out.
So these two nodes seem to be incomplete with regard to curves. One node for breps, another node for edges, no node yet for curves?

I think that a chamfer node or chamfer2 node can be created from the corresponding fillet or fillet2 nodes, once updated.
The coding must take quite a bit of effort.

- Brian