The previous post was spam so I deleted it.
Nice boy you have! I really like him. How old again? 11 months or so? Nice obedience base and engagmment. Happy to play and work with you. Calm bites, not hectic trashing or chewing. You've done well with him! He is getting the idea of barking for the sleeve - watch as he gets older and he starts to take protection more seriously, doing a hold-and-bark on you may start to conflict him. I was the same with Gryff: when he was younger and the bite work was all fun and games, we had tons of fun doing this kind of stuff with a wedge. Then he matured, he was starting to work in defense, and if I wanted to play with him and get him to do a H&B on me, I could see the confusion in his eyes, really conflicted, very worried - he just did not feel right barking at me. So I stopped playing doing H&B myself, just not fair to put him in that mental confusion.
I don't know if you are open to some input, I know that you are pretty good at taking what you feel will help and not getting upset about the rest.
I think your boy has a lot of natural talent and potential and has a natural, genetic calm bite, and so I wouldn't accept anything but full bites - most of the bites on that wedge are shallow. He is very calm in his work, so should be easy to get him to understand to go for a full bite. Freeze and lock up at the shallow bites, and as soon as he re-adjusts, let him win, or start up the tug game again then let him win.
Very athletic boy too! Takes a lot of body awareness and self control to be able to run up an obstacle like that and stop and balance on top like that until released. He seems like such a fun dog!