Andy Graham for President! When I visited him at the ASO, he showed me what it takes to research and issue these things and it's not as easy as you might imagine. Dusty old tomes of frequently vague and sometime seemingly contradictory info for most of the manufacturing history. No SQL dbase or anything like that unless it's a newer model. Lots of data to sift through, hence the price, which is a bargain considering what he does to put these together so nicely.