Michael, is there a way you can add a function to >highlight open curves< like this?

This appears to be a common problem everyone experiences every now and then. If there was a tool that you could run that would say turn on the points at the open ends of your curves, it would give you a heads up before you attempt to create your surfaces. If you see 2 points on a curve that you feel should be closed then you immediately know something is not correct.

You could then easily press ESC to remove the points after fixing any curves that should have been closed.

Just a thought on how to eliminate this common user error...

-Will