A friend brought round their rather neglected utility bike. The rear derailleur had gone on a journey into the mudguard stays - something I hadn't seen before. I'm more used to rds heading into the spokes.
A new rd hanger, one of my good used rds and a new chain were lined up, along with hanger alignment tool.
I took the role of teacher, and my friend did as he was told.
Parts were removed and other parts were fitted, adjusted and checked.
Coffee was drunk.
The job was pronounced a success, and the old Dawes avoids the tip for a few more years.