Hi John,
Congrats on the progress; can't wait to see some pictures of the work.
I agree with the rest of the crew...30 tons to press on the end caps of a U-joint is very excessive. Heck, I've used much less taking old rusty ones off...
Not sure what everyone else does, but I always clean the shaft holes with a round pipe cleaner (like the plumbers use for copper pipe) and then check for any burrs. If any are found I use a small round file to remove the burrs). Then, after a thorough washing and drying I'll spread a thin film of anti-sieze on the shaft holes prior to installing the U-joints. It acts as a lubricant and also makes for easier removal when replacement is required.
Good luck and drop us some pictures!!!