Hi Michael,
"""""""""do you mean one of your goals with your own 3DM reader was to do a curve length unwrapper like this one here?""""""""
No, totally unrelated... It was just a better understanding of what the underlying definition is.. Kindof like learning to read what I'm looking at when looking at the raw NURBS data. An analogy could be understanding how to write html with notepad instead of a wysiwyg editor. If I could write a 3dm file with notepad and then just compile it, I would be better at working with it!