Has anyone ever used those furniture slider things that are supposed to make it easy to move heavy furniture across carpet and other surfaces? Here's a link of what I am talking about. I want to move a 36-in, 3-drawer metal file cabinet at work (so standard metal office furniture) just like 10 feet. I can push it (if I work hard at it) but its very heavy ... and I've ended injuring myself resulting in surgery doing it before. If you use these things, how do you get it underneath the heavy furniture to begin with, and do do they really allow you to move a heavy metal cabinet across carpet (the thin office floor type carpet squares)?