to begin with, the Ref Dac will be located on the Tana (Herzan) shelf where the NVS has been. assuming the height of the Tana does not cause a cable length issue for the USB reaching the two servers. otherwise the Ref dac will sit 'naked' on the top shelf. i'll go from there. i am curious about whether the Tana or double Dazia will be more complimentary, or exactly which shelf interface will end up being best. it will take some time to figure it out.And you can place reference server, transport, and PSU each on Herznan or some active isolation where you can mod each with its own power supply. Now imagine if that owner also has CH in individual blocks with its power supplies