>FWIW i connected my grounds jack-to-jack with uninsulated copper wire,
with an insulated piece going back to the pcb EXACTLY how paul does not recommend, and exactly what i believe the oakley instructions do recommend.
This is true, but don't forget that the Oakley ground is not the same as the MOTM ground. Module ground is never taken to the front panel earthing lugs, but the so-called 'panel ground' is.