I don't and never will advocate sharing copyrighted information. Some of my personal data comes from carbines I've had the chance to own or examine. In addition, there's often a number of M1icon carbines for sale at any of the online gun auctions and these often have detailed pictures and descriptions. Some folks on forums like this one or CMPicon post pictures and descriptions of their carbines, especially of the recent release of mostly original Bavarian carbines. There is a wealth of info that can be assembled without copyright infringement. Just imagine if every M1 carbine listed at the database on the CMP forum was accompanied by a barrel date and manufacturer?
Regarding detailed information on original M1's, I'll save mine for the Carbine Club. The yearly dues are said to be well worth the modest yearly dues and I look forward to filling out data sheets for my Saginaw Division M1's.