Updated script to version 03.
Added start point and end point selection. Did not add check that startpoint < endpoint. startpoint = (0,0,0) typically.
Deleted cLength.
Deleted second half of Kappa and Tau curves.
Adjusted initial values of T, N, and B.
Added an alternate selection of values for T, N, and B, called antiFrenet.
The color g_style_index is not being used correctly. (It is better not to use the second color, usually red, when running the script.)

Running the script, without anti, can create half of a Moebius strip of width 1.6 units.
Rotating the results in top view, from the origin, by 180 degrees, produces the other half of the Moebius strip.
Alternatively, re-run the script with the anti checkbox, will produce the same second half. So anti is not needed.

Loft(s) creates the ribbon(s).

The curves do not quite match up at the inflection point, because the source curves are not quite right,
so a little bit can be deleted from each end, and the ends of the lofted ribbons Blended with G2 curvature.
The centerline can also be blended G2. The Blended strip can have a few points arrayed on its centerline, and isolines added.
The result is not quite perfect.

- Brian