This was remixed from another model. The other model had dimensions closest to that of a Cicada/Racerstar 30a ESC. The orginal model didn't have a bottom and wouldn't sit well on the thin arms of my build. I added a bottom and opened up the holes to allow an esc to slide in.
Edit(Dec20-2016):It was brought to my attention that the original file had some errors(I don't have a printer). Also the original slits weren't symmetrical. I've since fixed those issues and it should print fine. I've also added some other versions with different cutouts in the center portion, as well as a blank to create your own.