Lots of good ideas floating. What if? with Jacks idea (above) the four base holes were tapped, and ever so slowly one by one, bolts are
tightened lifting the mill evenly and Jack's idea slipped in there and bolted up. Myself its the quick and easy not a nasa machined thing.
You only need a little clearance on a concrete floor and if a wheel or something crokes it wont go far like 3/16 inch. Then when moved,
suppose these four bolts aid in leveling? I should think? For me, my four holes are like 3/4 I have taps for that, that should lift
3000lb or + only a shave of the floor. Then remove this (jig) put in the corner for who knows when......or never again.
golden rule;;;;; moving and rigging the heavy's keep it low to the ground.
samuel