When I registered it, singular was also avaliable, but I think plural makes more sense.
Crodo, I personally always purchase both singular and plural providing availability of course. Always.
Jimmy Page's Autograph, nice. I saw my (teenage) Guitar Hero in 1991 at the Brisbane Entertainment Centre, when Page & Plant were doing a world tour. I vividly remember looking at Jimmy through a pair of binoculars I rented from the lobby for $10, I was zoomed in on his fingers and the fretboard during the guitar solo for Heartbreaker, it was perfect an almost note for note rendition from the Album version. Jimming was actually drooling, it is one of my most treasured memories. Then I grew up and starting paying proper attention to Frank Zappa.
Regards.matt