Yes, I think I got it sorted out now. I’ve been drawing some more on the structure, and it gradually becomes clearer. Doing UML is a bit like code refactoring, useful for learning the code. Here another “thin” model (intended for overview) with some glitches which gradually will be plugged as I dig deeper into RhinoCommon :
Fig.1. Another RILCheatSheet™ :
// Rolf