whatmeworry,
Thanks for the info. It is nice of you to post it here. But, as I said above, "Luckily, I have a vintage front (input) shaft from a donor transmission."
There is no better tool for the job; however, if I did not have my input shaft, I would go for the metal tool you describe.
[img]
http://home.nycap.rr.com/lederman/images/alfred.jpg[/img]
I gave up tobacco 26 years ago, but whiskey still works for me.
Thanks,
Tim