I'll have to check mine out. I haven't run it much, but metal on plastic will show wear immediately. I'm running the HL metal tracks, and the tension is fairly tight on them, but I'll check and see what's going on with mine.

I am assuming that the idea to move the rollers is based on wanting the presentation to be accurate, otherwise I'd say it might be easier to relocate the shocks themselves (4 vs 6, and one bolt vs glue?) or make a washer that fits under the shock screw that keeps the track from being able to reach the plastic body. It wouldn't take much, and painted black/shaped to fit, should be unnoticeable to the eye except if the tank was viewed directly from the side.

Or if it will work where the rubbing occurs, use black shrink rap to add a wear barrier.

Scratch that, got a better view of the mount, the washer idea might work, but that's it. Still would have to modify a washer a fair amount to get it to clear the mount design without cutting the mount up a hair.

http://www.rccommand.com/stug4_large.jpg