In between running errands related to mother's day (on a different bicycle likely to show up later in this thread), I was able to put in 20 miles on my 1980s (?) Andre Bertin. It's a mix of French and Japanese parts and rocks 7-speed indexed down tube shifters and a tubular wheel set. The Challenge sew-ups are very nice, fairly wide, and this frame has just enough clearance to make them work. Unfortunately, that tight clearance is a problem if you pop a spoke in the rear wheel, which I did climbing out of the saddle with about 4-5 miles to go. I loosened the rear brake, tightened and loosened some spokes, and was able to tolerate a little bit of chain stay rub to make it home.

Boston-area folk might make out the Weston toll booths on the Mass Pike in the background of this pic: