On the related topic of saving old cables....
I hesitate to do so as I noticed the original cables I had on my 84 Peugeot actually got brittle and frayed right where they have to bend around the BB to go up to the FD. It took over 20 years for it to happen, but I was still surprised that they did that. The cables were fine otherwise and never nicked or scratched in that area, plus no sign of corrosion. I don't think it's the radius bend that did it in as the same thing happened to the free end extension past the pinch bolt of my FD. Do some types/brands of cables go through some sort of "embrittlement" aging??