I didn't make any adjustments. I think it is just the weight of the slide running on the rollers that destroys the plastic coating.
I bought a chunk of galvanized duct material and cut it to size.
Make the sheet metal strip about one inch wider than the roller.
Use stainless screws and pre drill the holes in the metal. Be sure the screws will be outside of the roller.
Measure for length, jack the slide up a bit, caulk the metal, put it in place and screw it down.
I also used a 2x4 up against the metal before screwing it as to get a good fit to the wood.
I measured for length with the slide out and made sure the roller was going to be on the metal in any position.
I had to do the job on the next roller as well.
Any questions or if you need more pics, I think I have some somewhere, just ask.
Peace
Dave