I have finally pretty much completed my fully balanced Buffalo II DAC with the Tube-I-zator tube SRPP I/V stage output. The Tube-I-zator boards include Mundorf Silver/Oil caps, Texas Components TX2575 resistors and the Telefunken ECC88/6DJ8 tubes (thanks to Ben (strider) for these) in the output stage. It sounds absolutely phenominal! I cannot recommend others doing their own enough. You will be blow away by the clarity, soundstage, resolution, and both bass and trebble extension of this DAC. Amazing. I have included some pictures below if the DAC. Thanks for looking.