Ok so there is a lot of confusing information when it comes to the "brain" and what does it have in it. Can someone confirm what the "brain" is built of? Does it have a battery inside? I see that all the brains have a power switch on the right side and 3 inputs/outputs on the lower back , what are they ? Also Since the FIX LENS version seems to be thicker , why is that so? It is because there is more space needed for the fix lens mechanism? I would like somebody to let us know all this information if possible. Thanks!!:detective2: