That has me quite interesting. I have a D1 with swapped out tubes and swappd out DAC.
I have been considering a D2 and just pop the lid off and do what I did with the D1 to the D2. I dno't use the HP output, nor the line in or out anymore unless I take it on the go with me.
It already sounds spectacular with the way I have it set up so I am curious if it will be even better.
I have a SUN HDAM and WE 396A tube.