I really liked the idea of this model but wanted to mount it to my multiboard. So i decided to remix it and add 4 standard multiboard snaps to the back of it. I did the standard fit size, and so far the 4 snaps have proven to be plenty strong to hold the batteries, although i dont currently have 48 but it feels quite secure.
I'm not sure if it can print without supports, but being the snaps needed to print out nicely to ensure a strong fit, i used supports on just those pieces with manual supports. after the first layer i put the X1c in sport mode and let is cruise, completing the print in just under 3 hours.