Appropos of nothing, I remember those halcyon days of the mid-1970s when I could (and did) walk into Talbot's in Sam Mateo and see, among all the other goodies two stacks of chainrings for sale, one Campy NR and one Shimano 1st-gen DA, in any size you could possibly want. They had at least one in every size from 39 (DA) or 42 (NR) well into the 50s. Them's wuz the days, by crackey . . . .

Now get off my lawn.