Woody, the multiple burkert setup has other advantages.
1)No low pressure needed in the machine, what eliminates the need for a regulator -a thing that cant handle liquid CO2-(and in the UK FRA rules, the multiple PRDs)
2) Straigth from the box solution. Buy Burkert 5404 valves and you dont have to build controling parts for the ball valve. The only thing needed for a sure function is 36V to control the solenoids.
3) Space and weight needed. Compare a 1 ball valve with controling piston, control valve, hoses, connectors and regulator to 4 burkerts set aside. (this is overkill for a 4 bore ram)
4) Pricetag if everything is bought new. All the low pressure parts add seriously to the cost.

But Chad, if youre not on a budget, or have acces to CNC machines, A Woody 3/2 or 5/2 valve with Maddox control soleno¯d is the best of all worlds. (TAN and Ka-Put use these)
No size restrictions at all, instant opening, no LP setup needed, and best of all, lightweight compared to KV