I've added the power supply change document.

Please have a look and let me know if it requires further clarification.

I have ordered some plastic "pot twiddlers".

I have run a simple test with the four FEE64 here + detector.

The sequence was :- 

Run the system with filtered PSU and record FWHM for 1.4.L for each of the four FEE64 boards.

Replace the PSU with a standard but with outputs set as per the attachement.

Results were approx 1.5 x worse.

Replace filtered PSU..... back as expected.

Addition: For Filter PSU only :- Set +5v to +6v when the FEE64 is not attached.

This is required as the extar impedance of the filter drops the voltage too much by the time it reaches the FEE64.