Wow, this is so clever.
Really loving the Bandits design. It's so reminiscent of an old fashioned suitcase that I think it's perfect for a travel tray. Is that design available with the lighter blue fold lines? I was wondering if it would work wihtout any fold lines at all - or maybe just tiny lines at either end of the fold. I think it just shows up too strongly, particularly against the gold background of the dice tray floor and the walls.
Love your suggestion of scaling this up. Am going to give the standard version a try and then might mess about with resizing the pieces to fit exactly into my travel games case.