Hi Tom,

re:
> The slider function is a nice enhancement, but why does
> the slider-script only display half a circle ? Is there an
> explanation how to use it correctly ?

Brian mentions something about that here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=5616.9

It sounds like the slider version makes a half circle because it was for making profile curves for a 2 rail sweep with the endpoints on rail curves.

If you want to make a flat one and not one between 2 rail curves, probably use the SuperEllipse version instead.

- Michael