Hey when you start working on a stainless steel rock procter make sure you put lots of rivits in it pre drill the holes in your shop. I have noticed brand-new owners with rock protecter blown off. I just had one riped off in a Dirt Devil. in west Texas. I looked at a new Bambi in Lubbock, Texas. They had factory guards with 3 alum. brackets and 4 rivits on each..this problem is very real. Put at least 12-15 rivits on the piano hing. The Stainless screws will get ripped out. Mine are on the road north of Plainveiw, Texas....along with a rock guard....Be alert to this problem....Jack the rat...