Harley,
I've only fitted one, an Ed Brown. Tab was fine on mine (probably on all of them) but entire OD had to have material CAREFULLY removed in a symetrical fashion. I have a small lathe in my garage so it was no problem for me.
You might try centering the bushing on a bolt with a couple washers and nuts so that you make a mandrel. Chuck the end of the home-made mandrel in your drill and use this to rotate the bushing. Use strips of emery/crocus cloth to gradually remove material from the OD. Very time consuming, but with a little patience you could be confident of a good, tight fit. Keep your calipers handy and check the OD often. You can always take more off, but you can't put it back on... Enjoy.
Waldo1
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"'Necessity' is the plea for every infringement upon human freedom.
It is the argument of tyrants; it is the creed of slaves."
William Pitt, 1783