Replaced F version with ElasticaSphericalJ version, with slight modifications to the end of the script.
The F version did an automatic Join of "righthand" curve with its mirror, at the startpoint (0,0,1).
If the ends of the two curves occur very close together, within some tolerance, Moi will close the ends of the curves, even though there was a slight gap,
or a slight crossover. This could even cause a tiny loop to form.

With the Join Halves checkbox unchecked, the two halves of the curve remain unjoined.
The ends of the two curves maintain their gap or crossed configuration, to aid in fine-tuning closure.
The user can then join any tiny gap remaining. (Best not to close a tiny crossover of the ends.)

- Brian

ps. For the "pringle" curve, the pSquared was 0.013+, not 0.13