I was thinking of using a cast aluminum box, socketed automotive relays, higher capacity diodes, diodes for the relay coils, adding a delay to headlight relay so it cuts in a bit later after the power is stable, input for our voltage regulator/cable output to a mosfet regulator that could mount on the top of the box for more cooling, maybe adding one or two more relays if there is room--really want at least one more for the ignition system mod, sockets for mini-fuses, cable for plug in of battery tender.
I do electronics design for a living and should be able to spit out a custom PCB for this pretty quick. Main issues are figuring out what the current box and wiring does, what is lacking, and how to make the new stuff fit.
How important are headlight modulators to people? I was leaning toward getting an HID myself and I didn't think the two are compatible.
Also looks like someone else was planning on doing some sort of Junction box replacement. Wonder what they have in mind? Hate to waste time on a duplicate effort.