You've already gotten a lot of good advice. He is definitely scared of you, and submissive/excited peeing is something that is extremely hard to get through. Don't think that it is something you can work through quickly. My biggest suggestion to you would be to get a belly band, or a few. Not so much for him but for you. It's harder to lose your temper with Chaz if you can't see a puddle. With lots of hard work you'll regain his trust. As long as you realize that it is a process you'll do great. Good luck.
