Having a fair bit of aggro with this function. I've taken a lot of care here but still the thing won't play ball for the full 360 degrees. Initially i thought it was cos I hadn't formed the elipse perpendicular to its axis, but then again I did it using Scale, so it should have bee right?
In Pro Desk Top you are advised to comence extrusions of this sort with a straight line (thus giving a guaranteed 90 degree angle), THEN go off on the desired pathway. Guess i could having taken this route (pun) here, done the shape as a semi-circle, reflected it and then tweaked it using scale. Seems a faff about, but is that a better way?