I have a couple of the tools
T83T 6701 A Rear Crankshaft Seal Replacer
T83T 6312 B Water Pump Nut Wrench
T83T 9527 A Nozzle Seat Cleaner
They are quite expensive. The Rotunda kits come up on E-Bay all the time, and some parts are missing. I think mechanics that have them, piece them out and sell separately and can make more money on them.
I wanted the nozzle seat cleaner, and it was always over $100. Kept watch, and sometimes the seller drops the price, and got it for $75, and free shipping. Said used, but was brand new.
Old Bull who has passed away, has the blue prints posted to make the Freeze Plug tool.
Specialty tool are important to have for that one time use. Then they take up room in the tool box of specialty tools.
But I would rather have it and not use it than need it and not have it.
Goat