This is so great. I have 2 magnetic trays and I don't know why the top screw was in the tray, and the lower one was missing, but it just seems this 72 year old brain also needs replacing. The 2 clamps I had to spend 30 dollars to replace because I couldn't locate them? Well I found the two clamps magnetically attached on the bottom of one of the trays. Was hoping he missing screw was maybe attached there also, but it wasn't.