If you have a MAVIC rear hub that runs the cassette on carrier with an inner nylon bushing that goes bad every couple thousand miles or so, the HUB DOCTOR has invented the mother of all "IMS solutions"
If you even know what I'm talking about, you get me. You know the pain. Good news- life is about to get better.
In the past, I've kept my SSC rims and crossmax running by mounting larger and larger (oversized) bushings (sold by the hub doctor)
Finally, I reached the end of what he offered- but then he offered something more. He abandoned the hub carrier bushing -
This guy has retrofitted the entire cassette carrier with an inner sealed bearing.
A pain to sand into tolerance and install. Total awesome in application. People like the hub doctor make the world a better place.
It is better than factory (and reasonably priced).
https://www.ebay.com/itm/231934551435