How can you find out what year a C40 is? I recently put down a deposit on a NOS C40 B Stay, and it just occured to me (from reading a great article at Velo News) that there have been a number of developments in the frame, particularly in the BB shell, where it went from alluminum to titanium. So, I have an additional question, is there a reason to not buy the C40 B-Stay if it has an aluminum BB shell? Thanks.