Starting this thread as I don't want to hijack Bowsers existing thread. Well, I finally got around to pulling all of my bits and pieces together, and this is the general setup so far: -Triple batt sled (one spot for bottle, two for the batts to go in series). -Single p-MOSFET, with 8mm switch. -Small factor Voltmeter (blue LED). -Tactile spring loaded button with blue LED. -Varitube BF 510 connector. -Wires of appropriate gauges (not shown). -Appropriate resistors (not shown). General potential layout is shown, and the dimensions I am set on at present are: W75mm x H115mm x D25mm Which will give enough room for the components without being tiiiiight. The only thing I am second guessing is the depth, as the deeper it is, the more room between the door and the bottle. Anyone have any insight into layouts and/or inner box dimensions? Id like to throw this out there before I start making a custom wooden box, as once its on the go, there is no turning back Cheers.