Fibonachu, do you think that the front lines being connected to the valve do anything other than pass through? My impression is that the 2 port versions only go in the line feeding the rear and the front(s) come directly from the master. Whereas the 4 port (sorry I don't understand the naming either) front lines are connected to the valve. I just don't know if the fronts being connected infleunces the way the valve adjusts the rear braking pressure.
I know Wildwood has both versions but I don't know if they created the 2 port version because of pricing pressure from competitors marketing 2 port valves mush cheaper.
