The view of the new electrical panel from the back. The panel itself is mounted onto a hinged plywood board that will drop down to a horizontal position, enabling easier troubleshooting and repairs. The back side is labeled, as is each individual wire. I have fabricated a negative buss bar. Each circuit will have a pair of wires for positive AND negative legs of the circuit, as opposed to having several fixtures use a common negative wire. While it adds a tiny bit to the cost of wire, it's no more difficult to run pairs of wire back to the common buss, and it should help isolate failures when they occur.