4-Speed Rebuilder Recommendation

They aren't too terribly difficult to rebuild, but they can be tricky to get together without some trial and error. I have been building them for many years, and currently have 5 A body 4 speed's in shop that I need to get done for customers. I'm sure there are books and You Tube videos on doing these, but I have made some of my own tools to make things easier. I can't tell you how many of these thing's I get in boxes torn apart that people gave up on. I am not by any means trying to talk anyone out of trying it, but to take them down the way I do and get into them, you best have a diagram/blowup of parts .