Revolve Q

 From:  Jeff Hammond (JEFF_HAMMOND)
(on a phone.. searching is rough.. etc)

when using Revolve, is there a way to set the angle interactively(?) without entering the numbers.. similar to how Rotate works?

currently, when I need to revolve a surface to an unknown angle, I'll over-spin it then draw cutting planes to trim the excess.

is there a better way?