I think it's a really good idea too! I would love to be able to see the rest of the collection and being able to purchase the sleeves individually would be really cool. I bought one for my Hubby and would love to get him some different sleeves to try
Sounds like a good idea for those who want multiple sleeves to save a little without having to buy the whole unit. But I think it's probably easier to store the sleeves inside the case, so not sure how they would hold up being stored without one.