Installed a Direct Lift 4-post lift in my shop the other day

It's a Direct Lift "Pro Park 8S". I don't think my floor is as level as it should be, so first I am going to level the lift out by putting steel plate under the low column(s). I can get the plate locally, in 1/16" thickness increments, from AirGas. Then I'll decide if I want to bolt it down. The casters for moving the lift around are pretty ingenious and work well, but I doubt that I'll want to move it after I get it finally situated.