Well done, Amos. Very clear description of the PC board (interesting) and the benefits of the MB design.
I had the pleasure of helping my son-in-law setup his first real Schiit stack:
iPod touch (ALAC) -> Apple camera cable -> USB cable -> Eitr -> ModiMB -> Loki -> Magni3 -> HD650.
All cables (except the Apple) are Schiit PYST.
Total rig cost ~$1,100 including the HPs, not counting the iPod that was on hand.
I tested the rig with my HD800 headphones and was pleasantly surprised by the SQ and how well the rig drove them.
Thanks for the tip about the Vali2 amp sounding better than the Magni3. Christmas is coming
Cheers,
RCB