I think I have the two port version (I will check!) as this suits my set up well as I use a front/rear split with a willwood adjustable bias valve for the rear. Just set it up in the rain so that the rears never locked up and left it alone.

Threw all the escort ABS stuff away, including the rear proportioning valves which commonly seize and don't work, new copper lines, welded up a pair of brackets and was happy with the result.

Rob,