Good info to know in the first post :****:
Front:
Single line from master to the frame, if linked, run flex line from frame to hard line or stainless flex down the upper link to flex line to Tee, to hard lines, to C's, to flex lines, to calipers.
Rear:
Single line from master to the frame, a 5lb residual valve, if linked run flex line from frame to hard line or stainless flex down the upper link to flex line to Tee, to hard lines to end of axle, flex lines to calipers.
Ive ran with and without proportional valves and although nice to fine tune front to rear bias, didnt notice much of a difference.
Last 2 rigs ran with out them.
Brakes stop on a dime and give you change back.