Bearing noise plus scraping noise

I knew the bearings were getting worn, they made noise for years. A new urgent scraping noise started so I ordered all bearing parts. The scraping noise ended up being the blower fan working loose on its shaft and rubbing on its housing. Very easy to reseat and tighten. But while things were apart I replaced the front slides and rear bearings. Did not need to replace the front bearing which is really just a plastic housing that the slides fit on, returned for a refund. With their video, disassembly was a breeze. Quieter than it has been in years, thanks