I found the roll top box really nice, and started thinking where else a rolling cover would be useful. I designed this enclosure for my Mintyboost. It allows you to swap out the AA batteries by rolling the cover around. Check out version 2 in the remix box for a more refined version that doesn't need a battery holder. Overall size is 4.15" long x 1.85" wide x 0.83" tall. The cover can continuously slide around the enclosure, it's kind of addicting!