When learning it, not after you have mastered it... and you probably don't have a crowhop either... do they ???I think that the NCAA interpretation is also looking at the arm circle. There must not be a pause in the circle. If there I'd a hitch in the circle it well be called illegal.
I can see this being very reverential to this topic. Cause & effect. Because it gives Ump an easier view...they can't watch for it in every circumstance.