After digging into my 2 i3's pretty deeply over the last month I've come to the conclusion that one of the biggest generators of artifacts, be they banding, salmon skin, irregularities, in the X and Z directions is the wheels shipped with these kits. They are unfortunately cheap and not manufactured to the highest standards. About what you'd expect given the price. I've actually had to get FLSun to ship me a bag of replacements because of this, but only a few in the entire bag were near being 'true'.
Has anyone had any luck with replacing these from a 3rd party? I've seen Delrin wheels (well, supposedly Delrin) on AliExpress, but has anyone tried them? Any good?
I have a redesigned carriage system I'd like to publish that greatly improves X and Z rigidity, but the wheels are doing the same thing they have on every carriage I've tried and caused it to move in ways it shouldn't.