Great story on the acquisition. Wish I would have been more insightful back in the 80's when I started collecting to get an AF15. As far as your book, IMO, I would leave it as it is. If it's delicate, I wouldn't press it. I'm not a fan of signed books per se, but if the book has potential of being dubbed as brittle, a signature might help if you decided to sell it. I have a key book (not quite of this caliber) that I became "star struck" or had that "eureka" moment because of the opportunity to own such a book. Little did I realize that a some finger print ink smudges would be detrimental to desirability of said key, but alas, it has become an issue when I present the book for sale. I've been contemplating getting Stan to sign it, but I just don't like the big blob of mess his signature often appears to be. Again, my 2 pennies. Oh yea, grade, I'd go 2.5 - 3.0 on this one.