Looks like I tightened the lockring crooked last night and thereby ruined the thread on the freehub. I tried a few more times now and the cassette has no more play but the lockring is skewed. So thats probably a new freehub.
I've definitely started one piss but I've never ruined a lockring from doing so. It's usually easy to tell that it's not going on easy and/or straight. Yeah, I always do a little backspin before tightening them up.
Looks like I tightened the lockring crooked last night and thereby ruined the thread on the freehub. I tried a few more times now and the cassette has no more play but the lockring is skewed. So thats probably a new freehub.