Small uneveness on outwall - but only on certain sides

[StreetSports]

Its a thing. Theres a really long thread about it here.

Persistent 2mm VFAs on X-axis

That’s fair enough, a resin print might be close enough to get meaningful results, or the old trick of a bit of belt glued on inside out (the profile is wrong but it usually softens things enough to solve belt noise in other applications)