For standalone curves, I'm going to put a scripted "Join" and re-Trim in the _TrimCurve test script, as a "workaround" for MoI3.
Likewise for script in progress _ObliqueConeUnwrap.

For edge curves, I'm going to attempt to put in a scripted "Merge".

Adding startpoint to the already arrayed points seems to do no harm, in case of open standalone curves or open edge curves,
and so will be added for consistency with closed curves.

- Brian