John,
Just a suggestion, but you might want to suggest to your customers that when they want that chalk pocket, they make it big enough for one of those 2xcube holders (cube tube maybe?) that I've seen someone on AZ selling. It would definitely keep the inside of these beautiful cases a little less blue/green/tan/etc. by keeping the chalk enclosed in the tube while in the chalk pocket rather than exposed to the leather...
Just a thought...
Jason