I agree Dave. I have only had to assign the axis of revolution a
handful of times in 15+ years. If you create only ONE geometry
centerline, Pro (WF3 and previous) assumes it is the axis of revolution.
If you create more than one geometry centerline, it assumes the first
one you created is the axis of revolution. This is the only situation
where I have actually had to reassign the axis. (when it was actually
the second instance that was the axis of revolution).
T