I watched a couple of the videos, discovered the whole ABEC thing is kind of crap. Good to know.
I have a CAAD10 and a bearing on one side is feeling a bit rough..hoping it makes it through sloppy weather season and then I will replace in the spring. I have a set bearings on had, but I bought them on ebay so I am sure they are Chinese knockoffs Hambini warns against. They feel perfectly smooth, but one had more drag than the other. I popped the seals off and discovered that one of the seals on the draggy one had a bit of slop and evenness around the lip. I was able to trim that off and that reduced drag quite a bit. I guess I will use them for as long as they last and then invest in higher quality.