I guess I'll get the ball rolling with the BA cap mod for the HDAM module.
Simply put it's a 1uf film and foil cap (PIO Russian K42Y-2 160V in my case) of 50V rating or better connected parallel to the V- and V+ pins on the HDAM module.
Here's a pic showing the solder points on the LC module (Lawrence Chan's first generation "Earth" module).
Please note second generation HDAM modules from audio-gd are far easier to add this cap to because of the pcb assembly of the units exposes good pad areas where the V- and V+ pins are located. The third pic shows BA's drawing of the HDAM pin outputs.
The V2 revs of HDAM have caps tied to gnd, 1 cap for each channel. It has yet to be determined if removal of these in favor of a PIO and hooked up the way BA suggests is the way to go....as always these things take time to compare and it is being looked at.
Peete.