Well, you are in the home stretch. An auto trans rebuild is an advanced job, and even though you have to go back a step to make it right, you know how it is going to feel when it is perfect.
I also want to encourage you to keep posting pictures. Every time you do, you are showing people like me what it's like, well, like the last picture. Now I know what it is like with the seats out. I may use that someday!