Im in central QLD Rockhampton.
Yea a Mazda bravo b2500.
Im gining up on the stealth under tray install all air tanks/compressors will be going into a tool box bolted to the tray. The height of under side of the tray to the supports is approx 4" my tank in 6".
Tank with 2 viar pressure switch/really combined units is arround 3ft 10" may even try to get 2 tanks 4 compressors in there.
Tank 1 will have my 2 viar 444c’s on a 165-200 pressure switch tank 2 will be a 100-120 pressure switch.
tank 1 will have a pressure reg feeding 200psi to 120psi into the 2nd tank. Tank 2 will have a line with a check valve on it.
That way tank 1 will feed tank 2 at 120psi and tank 2 can go one way into 1 at 120psi
P5 on a manual valve and K5 on electric