V12*2: I like that design, but it's really big.
I prefer to work with PVC fittings, because it's so much easier, although somewhat limiting at times.
I'd run a 1 1/2" PVC tube horizontally, from the back to the front of the case, with a tee in the middle, for the air to escape, and for a liquid inlet (through the top of the case). Alternatively, the fill point could protrude from the back of the case, so the flow would have to be front-to-back. Either way, the fill point needs to be downstream.
The problem with that, is that it can call for sacrificing the top 1 or two drive bays, or make it shorter to avoid the sacrifice, but that requires very careful measurements.
