Myself, I just would not even consider an RV without a slide. That wear is why they went to the steel track newer design. The rocking going down the road will eventually wreck the teeth on aluminum tracks. That said, We have 40K on our Class A and while I can see the tracks are getting worn in the close position, I still have a while until I need to replace the track (the more worn it gets, the more play there will be and the faster the wear will accelerate). Unfortunately just another maintenance item they saddled us with. It is nice not having to worry about putting locking sticks at the top of the slide before driving, though. We'll see how the new steel design lasts. If I were you, I'd just get another aluminum track and install it. I'd worry about a stainless part eating up the gear which would be a real PITA to replace.