How do you keep track of your collection?? Do you use an excel spreadsheet or a database of some sort?? I'm curious because as my collection is slowly growing i've been wondering how to keep track of it all. I was thinking a making an access database where you could pick ... say Op. Prime. Then select all the series he's been in i.e. G1, G2, etc.. then select the version (hasbro, hasbro reissue, Taraka reissue) and a list of all the parts for that release would display. You could select what parts you have, or if it's MISB or MIB etc. I'd also add a cost field and date field so i know what i paid and when... cause i care. Anyone use anything like that?? or would use?