I think it is a great idea. Some info does creep in at times ... maybe info on springs is the most common but I have seen bits on pistons etc at times.
I started to compile a list of mainspring sizes for a range of guns, hoping that when I needed a spring for an old gun that I could simply look up the size to find which modern gun it might be possible to use. I would willingly donate the small amount of information I have; but beware some sources quoted different spring sizes.
Cheers, Phil