The NCAA-W wants it with focus on the "spin move" and "shooter's hop".

I would say work on getting the proper angle instead of getting off the end line. This includes the proper angle when a drive goes to the hoop which will not (in most cases) mean closing down or getting sucked into the play.

Many gyms will not allow you to get too far off the end line so it isn't even useful to practice it. I was working some games last weekend - two with Nevada - where I was forced to literally stand on the end line. There were a few plays where something happened right in my face, but for the most part it was OK.

Traveling is something many people miss, meaning miss the correct call, because they are splitting hairs. If traveling is your best call, you are in trouble. Also, a prominent D1 official always preaches to make errors of ommission instead of errors of commission.