I realize my floor isn't perfect and I won't actually be using "it" for measurements. I just want a stable platform that will allow my car to be "level" as the world goes. Since it's sitting on jacks that are sitting on the floor, well, that's the best I can do with what I have to work with. Sorry if some of you geniuses are offended by my redneck means. I don't normally have thin skin, but this thread has degenerated so far from the original question...