One of the things I'm working on for my new camera rig power system using standard RC hobby LiPo batteries instead of obscenely expensive commercial ones.
This is a case for the DC buck converter from http://amzn.com/B00Q48BRFO that mounts down to a 1/4" bolt.
Requires a 1/4" nut, and 4 21mm M3 screws. XT60 connector gets epoxied into the obvious spot, the 3 7mm holes are to fit 5.5x2.1mm barrel jacks (bought here http://goo.gl/TIGBIR).
Test print #1 complete. Adjusted barrel jack hole size and spacing, adjusted LCD window and main cut size to fit width of board properly. Added a little bumper to keep PCB in place.