I got it! Haven't had a chance to look at it yet, did field training this morning. Brooks did a great job, first time he's seen someone other than me throw a bumper. He was straight out and straight back. There were some that were considerably longer than he's seen, landing in grass so he couldn't see them from where he started, and he did a great job marking them. We also did a few water retrieves, and his swimming improved greatly from our last session.