We bought our Taxc Flux 2 a couple of months ago and we have a lot of problems with the noise of the Taxc. As a non-expert, it looks like that it has something to do with the 'hub' as the cassette is slightly moving / dancing and not very stable. I am using exactly the same Casette as on my regular bike and there I don't have these issues. Attached you can find a short movie, which probably explains it a bit better.. Any help would be much appreciated.