I've been working with a friend to develop a small enclosure for my OpenBCI 16 channel system and I think it came out pretty nicely. I have space for a 3400mAh Li Ion battery, a Powerboost 500C charging board for USB recharging and power, an LED lighted external power switch and a cutout for access to the SD card slot. I installed touch proof sockets on one end for electrode attachment. I'm pretty happy with how it came out:
If anyone is interested in printing on of your own, I'm happy to share the STL files. Just thought it might be of interest to someone.
All the best,