Oh, I actually like this quite a bit. I use all kind of "cheat sheets" for computer stuff like editors (vi/vim, emacs) and basic commands in all kinds of stuff. As in, a three-ring binder stuffed full of laminated reference pages.
Good work!
Maybe one of these days I'll learn with the aid of a similar tool to read the C clef moveable fluently!
I like the idea, and at first glance, it's undoubtedly useful to many people.
A+! Good stuff.