Would be very useful indeed!The only other thing I take note of too is the rarity as defined by Freeman because it gives a general idea of the quantity out there. Adding anything now is a challenge anyway because of the sheer number of coins you have, but as it stands it's still an amazing reference for penny collectors! It would have to be adjusted to reflect new discoveries of known to him varieties plus census/estimated rarity of "not in Freeman" varieties (i.e.: Gouby varieties, etc.).. John Jerrams made a notable attempt in his SATIN reference, however as that was many years ago, even that is now outdated...