Thanks Danny.
Excellent graphical method. Should help doing a script.

So the apex of the cone is a single point for both wrapped and unwrapped objects.
The apex is obtainable by user selection for a cone, or by intersection for a frustrum or some other
portion of a cone.
I wonder what portion of a cone, or truncated cone, can be extracted by MoI, just by selecting the whole cone.
There is the "seam," the base radius and/or circle, maybe the apex, edges, heights...

Or else have the user select the different parts...

Handles curves on the cone.
I'd like to try and use MoI Nurbs commands as much as possible, and be able to apply it to cone-like objects?
Also apply it to intersections with other shapes, like pipe ducts?
But first, just handle the basic shapes.

- Brian