Why does nobody talk about the 0.005 tolerance mess on the old Bridgeport?

Honestly, I was running a job on a 1972 Bridgeport at my shop in Boise last Tuesday, trying to hit a 0.005 tolerance on a bracket. The quill feed started slipping mid-cut and I blew the spec by a mile. I shut it down, checked the manual, and found the worn pin in the feed mechanism. Ngl, I had to hand-scrape the part back to size over two hours. Has anyone else had to fix one of these old feeds, or is it just time to retire the machine?