Hi Danny, the result for those cases is just one single solid, all finished up. Also history works to edit the curve and have the solid update to match.

The only part that is not completely finished at this moment is getting the trimming to work between rail segments that are curved instead of line segments.

I'm going to keep working at it here for a few more hours, and if it looks like it is going to take a couple more days to finish that part I will release a new beta without it and then still have another beta release when that part is done.

- Michael