I know exactly what he is going to do with it as I am working on it as we speak. We live in a mountain area with rough roads so this will have a triple crankset, Shimano 10sp rear, and 650b x 38mm tires. He is keeping some of the 105 stuff on it as long as it works with the new setup. We both really love old, lugged steel frames but we also really love riding them so all of our bikes have this mod. (expect my two Treks that run 700c x 35mm, same idea tho) We keep all of the original parts but to be honest, we buy forever bikes, so our bikes will get ridden until we physically can't anymore.