Replaced slip rings and brushes on my alternator (finally!) and took in for testing (passed) before reinstalling.
At the parts store where I had it tested, they had to look up the same part to know what code to use with the test machine and the refurbished model of my alternator was $250. The kit to do 80% of the refurbishing diy was $19 on eBay. I think the full kit that also replaces the bearings (unneeded in my case) is about $35-40.
Tuesday should finally get time to put back in. Thanks to Metra Amtrak and Lumba2 I've been able to avoid working on BMWЯ in the subarctic temps of southeast wi. It will be great to be a two car family again though.
When I have a chance I'll post the video of my tips for swapping the slip rings. My method to remove the old slip rings is a lot easier than the chip away with screwdriver and crush in a vice method of the muse I copied to fix mine. In the photo you can see the gray epoxy that is covering the new wiring.