Slide marring floor

My Winnebago has an aluminum block covered with carpet that supports the inside edge of the slides as they come in. I'd noticed they started scratching the flooring after about 3 years. Pulled the block off and found that the carpet had acquired sand, tiny stones and all sorts of **** in the pile. Peeled it off the block...not very easy...stuck on with contact cement, and put on new carpet. I think their reasoning is that there will always be debris on the floor that can scratch the flooring and carpet is the best of bad choices as with luck, the debris will get trapped up in the pile and not have enough pressure on it to scratch the floor. RVs with hard plastic 'skids' seem to be the worst at scratching as they just grind whatever's between them and the floor like an abrasive. I think an issue with increased thickness would be most pronounced with the "Schwintek" type slides where the slide is kept in tight horizontal alignment as it goes in and out. Slides with other, bottom driven mechanisms are more free to tilt up without binding as they come in.... A reason broomstick blocks at the top when closed are helpful to keep the slide from rocking out at the top when going over rough roads, an issue the Schwintecs don't have..