Of course this whole argument wrt the WW is moot because
1. I doubt you'd be able to fit the Y inside a VCR-like case without seriously kinking the tubing (unless you used 90° fittings on the block... which means more PD calcs).
2. 1/2" tubing isn't really ideal for such a confined case. Swapping out barbs is easy enough though.
2. It's not really available yet!
I see now your right about the pump pressure thing... now I don't feel so good about buying a 28ft head pump for $120 USD! Hey, there's always microjetting experiments...