Ive never had an issue with the 10-pack amazon bearings. I always pack mine with white lithium grease. I like to change them out every 4-5 months, or more often when winter riding when they get wet so i refuse to buy expensive bearings
The axle is pressed in, with an additional set screw as safety. If you want to remove the axle you’ll also destroy the ID of the hanger bore, which is why just turned some sleeves instead of replacing the axle. Both is possible though.
The problem is the sleeves would have to be so thin (probably less than 020) and I can’t turn something that thin. The next option would be to remove the axle, press a thick piece on and turn it down, but I can’t remove the axle without a lot of drama.
These sleeves are Delrin, so super tough, so I think I’ll be ok. If not I’ll report back here from the hospital bed