On a friend's recommendation, I went out and bought some nylon washers to hopefully prevent rack rash on my new gear. The washers I picked up are maybe .100" thick and I'm putting them on both sides of the rack face. My noob question - now that I have effectively installed a .100" thick standoff, am I creating any undue stress on the rack face? I would think that I'd want the bearing surface to be the full height of the rack piece, not four little nylon washers or so circles. I do have some other nylon insulators (washers) that are .003" thick. Would this be a wiser choice to use? Thanks.