My Xray XT8

[BrianG]

The ring gear doesn't look quite as bad, but then again, the pinion will see 4.3X more wear than the ring simply because it has fewer teeth.

Shimming may take a bit of work to get so they mesh perfectly, but not too tight. And then, after several runs, you might want to take another look because there will be some wear and might need to tweak it a bit more. After that, they should be fine until they just wear out from extensive use or some other failure (fatigue, other part breaking , etc).