It just looks odd with the protruberance , Ive heard the 6au6's dont live very long in them ,the grid resistor of 1G on a 6au6 ,thats probably questionable too . The C37 and C800 are both cathode followers , I have a handful of teflon 7 pin tube sockets , so I will be having a go at the sony at some point ,I see some cheaper ribbon mics with a case identical to the pivoted C37's .The 800G is all gone a bit mad with the cooling section its like something that belongs in a Dr Who episode , like a deadly weapon that can wipe out the planet or something , tube mics are normally excellent even under condensing conditions , but doing the peltier for the sake of .3db is a load of baloney , while making the mic more suseptable to moisture in the process.