Yes, I understand and accept that point, and agree with the location of the manifold for the cold water.
But they put the hot water manifold in the wrong place. It should be next to the water heater. I'm going to to start a new thread at some point to discuss with people the process of moving the hot water manifold to the cavity under the washer-dryer on the 34QS. The cavity is covered by a kick plate and is right next to the water heater. It is inside (won't freeze) and is readily accessible. I think the job can be done in steps (one circuit at a time), rather than all at once.
I'm camping right now in cool weather and we are wasting incredible amounts of water and gas just to get the hot water into the lines to wash dishes or take a shower. Thermally, it blows away all the heat efficiency gains of the induced draft blower motor on the Girard tankless water heater.