got some wiring done today. one more thing off the checklist. we're gettin' there!
I decided to wire the valves up with 4 conductor trailer wire. pretty cheap, .79 a foot at Napa. went with 10 gauge primary wire from the battery to the relay and from the "unfused ignition" plug on the fuse block to the relay. I used stick-on nylon strap bases so I didn't drill multiple holes in an otherwise solid cab.
disclamer. I like wiring. I'm just weird like that.

and
once the main harness runs out of the rear of the cab, I attached it to the existing brake line.
thought I'd take a few pic of the tank plumbing. I notched the frame a bit so the 5 gallon AVS tank would sit centered between the frame rails..... and what's nice is the the fittings are now protected from rock kickups and roadkill.....
compressor leader to tank interface:
pressure switch to tank interface:
to keep my greasy paws off the switchbox controller, I had a thought last night while having a C & C. like?
next stop, valve bank and final plumbing.
to be continued.