Looks like it's all been said. Nothing left for me. I'll spin it a little differently. Every wiring project goes one wire at a time. The only positive, is once I get rolling it goes fast. I usually start with a schematic. It doesn't have to be engineering perfect just diagrammed and legible enough to follow. Color coded wires help. Unless you are only able to buy one type of color coded wires. You know, wire of one or two colors. Then that doesn't work or help me. The purpose of the wire. If I'm wiring in street lights then I like the bus and connecting wires to at least resemble each other. Negative one color and positive the other. If I'm wiring block wiring, or track wiring, then each block needs to have a different color. Power busses from a power supply to either the track on the layout, as in DCC.. needs two different colors but are maintained in the run around the layout. In Analog DC, as in to various control panels the wire needs to be color coordinated and stand out. Just some thoughts to help you make it more complicated. Say what?