Speaking of cassettes, it turns out I am even more of a cassette and chain hoarder than I thought I was. I have at least a half-dozen 10s cassettes that are NOT worn, along with about an equal number of unused 6701 10 speed chains. The cassettes are an equal mix of 105/Ultegra/Dura-Ace. I will keep them since the Roubaix and CX bike are still set up with 10 speed, but I think I have more than I need.
I only have one 11s chain and ZERO 11 speed cassettes on the pegboard though.