Here is my Cookie helmet with flatlock and home-made box for the CX100.
The box protects the CX100 with Raynox HD3030, I can use the big battery and the HYPEYE is inside the box with a cable for debriefing.
I only have to take the cam out for changing the battery.
With this system, When I take the box off, my helmet is clean, no unecessary cables.