My first review because I couldn't believe it. A square is just not a square. Unfortunately, I didn't realize this until one of the guys at my store brought it to my attention after he kept having to re-cut footage that mysteriously didn't fit. Now we know why. Also, aluminum is not flat. It's wavy because of the beating surgery or something. I have other aluminum angle bars that are perfectly flat. As someone who has worked in quality control I find this embarrassing for QC at Johnson. This person must not be able to leave the factory. This should be 100% checked with a pressure gauge or a simple automated system. Too bad it's American. Even China could get it right. In a Japanese or German company someone would be buried in the back.