I cut a piece of 5/8 thick steel plate 10" X 7" and slid it in from the side under and around to the front, to spread the front center temporary"3rd leg" weight out.
There was just room to slide the end if a slim crowbar in and raise the base casting enough to get a piece if .250 squair keystock in centered.
Measuring both sides with feelers revealed an astounding 100 thou difference........... I am letting it "rest" 48 hours in the three point position ,
hopefully some of the twist will spring out of the base.
I got an asortment pack of about a dozen 6" X 10" stainless steel shims from MSC they start at .001 and go up to .032
Going to try cutting them into an L shape about an inch wide , each leg 3" long
Dave Lawrence