For installation of a MaxJax, my garage floor is out 5/8" from one column to the other column. I am thinking the best fix is to epoxy down a 1/2" thick or 5/8" thick plate of aluminum or steel to the floor. What say you? I prefer aluminum to steel, because I know that I can drill the holes in the aluminum, but not so sure about the steel.
It seems like the other way, grinding 5/8" off the high side is not preferred because it's a garage floor and I will probably need every 1/16" of thickness I can get for the bolts.
Or, I could pour a small, 5/8" thick slab of concrete and steel with short rebar posts to the existing slab?