Modding the PS Audio Directstream DAC MK1 and MK2


I would like to continue discussing all the mods we have created for these two DAC's as it seems PS Audio is no longer allowing discussions about them on their forum.

For reference here is a link to the closed discussion.

https://forum.psaudio.com/t/modding-the-directstream-dac-mki/2680

128x128richardselectronics

Wow Jeff these power boards are elegantly designed. Thats more plug and play than I would have ever expected. 

I know this is a hard question to answer, but how "good" of an external PSU is needed to make a sonic improvement? Would a mid-level Chinese eBay linear PSU be better than what's in the unit already? Or is a top-flight linear needed to make a difference? (Obviously a better supply is a better choice but I am wondering how high/low the baseline internal PS is)

I'm curious about the heat issue.  I know having the external power supply will reduce the heat issue but how do we obtain the parts to use the external power supply?   Thanks!