So this weekend was our test. He was spectacular on land. Pinned the marks exactly, brought them back to heel, held the birds until I took them. Got several compliments on how nice he ran and was given the nickname Little Red Bullet.
Our inexperience bit us on water. It was really windy and the wind grabbed the duck and off it went down the pond among the stumps and waves. He never could find it again once he lost it, since it wasn't near where it had landed. He's never had to search for a mark in water before, always just marked it and swam for it, so that was totally my fault for lack of preparation.
Today he did pass the WC! My first field title!
After the WCX water they let him run the set up as two singles, and he did those fine too. So a little bit of bad luck for us that the wind kicked up as we were running yesterday, but it showed us what I need to work on with him.