with the options start-angle and full-circle, start angle does not have any effect.
this is not intuitive - nor is it what a user would expect.
use any curve
Enter Start-Angle 45
… start angle will not have any effect.
without start angle - full circle should result in 0…360
with start angle - full circle should result in (for example) 45…405
this is important if you want to control the Surface-Seam of a 360-degree revolve
kind regards -tom