As I was organizing my stuff I was taking out things for SB train. I have gotten a lot of media packs in the past and have pages that contain punch out letter, stickers and stuff. Are those okay to put in there? I also have some pages of vellum, or transparent paper, not sure which it is really, that I wont' use. Is that okay? I remember the thread saying no paper, so not sure if this stuff counts as paper though, and some of the pages might have a letter punched out or a sticker off, does that matter?