A833 Woes and how to paint it

Wow, i have torn down maybe 10 manual transmissions in my life,never needed a press for anything. Snap ring retainers usually hide under a steel plate screwed to case.
I pull parts, lay them out on a 4x8 sheet of plywood and inspect,clean and replace whats needed. I rarely had a manual for anything.

Its my opinion that if you can pull it out of the car, you have enough skill to fix it. Never underestimate your own abilities. What you paid to have work done would have bought you the manual and tools.
Best of luck.