Heh you are having a hell of a time mate. Sounds like we are in the same boat, very similar heat loads, little bit similar cases but of course your look and artistic audacity far outstrip mine

Look forward to your modifications, I'm just about to strip mine out for a rethink.

BTW I know flow is the goal for you but what are your temps like? What I mean is do you have such bad temps that you are worried about flow? My temps are not great on the CPU so I'm worried about everything But I'd be less worried about flow rate if my temps were good.