How will you address receivers marked only "1895" or "1896"?  Are they going to be considered "Models" or "Variants", like Flayderman, or something else?  I find that Mallory's serial number lists apparently ignore the 1895 date on many carbines and lists them  only as "M96C".  For me, that could be a problem in evaluating individual pieces and maybe even for verifying historical information.

I wish there was a better way to deal with the information.  I think spreadsheets are inherently limiting if trying to find significant deviations from a norm.  A true database may be better as it will, I think, support a search on almost any term or phrase and allow additional information to be added or changed to an item, but the size requirements of the server and software are enormous.  Nevertheless, you've done some work which is a lot more that I have done and the beginnings are hopeful.  Thank you for your efforts, truly!