Wow, looks great - both the storage and the tutorial. You must be one very organized person!
A couple of ?s, if you don't mind. You don't have any non-SU stamps? If so, did you buy DVD cases to store those in so they would match your SU sets? also, what do you do when the Tack-it finally loses its stickiness? I've done some of my unmounteds with the Aleene's. I like it, but for me its lack of longevity is a drawback. You probably know something I don't; would you share with me how you make it last?