OK, so I took my wire links.. and I combined 1&2 and fed it to pin 4 on the small pin group.
So the floppy noise and any of the screen feedback issues seem to be gone, but there is still the constant white noise in the background which modulates with anything being done, i.e. keyboard, HDD access or floppy access - but is now just a modulation of the white noise.
This can be heard with the volume at what I would call listening level - about 1/4 of its total volume.
I have still got all my STORM/CLOUDY and LIGHTNING on the board.. so I am going to remove that.. go back to just the CPU.. and I think put the exxos dual tos and decoder on.. I don't remember this noise when I first powered up the machine.
James