Leveling a mill is really only useful as an aid to leveling setups parallel with the table. If the mill is square with the world, you can use bubble levels, combination squares, and other simple tools for quicker setups of non critical jobs.That's the thing. I don't know how critical micro-leveling a machine with 60 years of service and wear is. I'm glad to hear you're not obsessed with it. I like the jack wheel idea (and I have the perfect donor). Northern has some sub-$10 3" cast iron casters with more than enough capacity for the Cincy, so ought to be fine for a BP.