Since I was a construction worker (actually an iron worker) for lots of years I've become pretty good at "eyeballing" if something is level or not so I guess I'll just use my "built in level". I'd always want it pretty level for comfort anyway. I just need to get busy and make some leveling blocks. Since I have shop equipment (plasma cutter, mig, tig, drill press, band saw, etc., etc.) I might have to see if I can come up with something aluminum. It would be more durable than the hollow plastic but still light. I think I'll wait till the daytime temps are out of the 100 degree range though.