Well, it wasn't a bad day! I can't believe how much I am learning!
A lady in the 50+ range came in with a really nice Rivendell Rambouillet. What a nice bike. This one had 26" wheels. Problem - chain jumping. I had not seen any of the Rivendell bikes first hand and I have to say that I was impressed. Really nice classic styling and the lugs certainly set it apart from anything else on the shop floor - Carbon or Aluminum. It is hard to find a steel frame road bike stock anymore.
She had replaced three chains on the bike already - can you say putting the miles on. The teeth on the cassette were shot and you could tell what gear she pedaled in the most. Man were they worn. I took a small piece of chain and was able to show her the deformation in the teeth and the widening of the valley. So a new chain and new cassette were in order.
I am studying "The Bicycle Wheel" by Jobst Brandt and will be building up some Mavic A719 rims with a SRAM i-light Dynamo front hub and use the existing rear hub (I might upgrade, but doubt it). I determined that I can run a set of Cygolite Niterider dual beam lights off the hub. Way better than relying on short run times on a full charge.