I haven't seen abnormal wear yet. There are a couple spots that are tricky to align correctly, so I'm wondering if that happened to him and he unknowingly fixed the alignment when replacing the belt. It's worth being detail-oriented and triple-checking everything when assembling.
But I've been having some clicking on Z-axis moves recently. My suspicion is that I accidentally got some filament debris where it shouldn't be. I haven't opened it up to investigate yet, so if it's a machine issue, I'll update here.