This was the WFS whose photodiode was repaced as the old one was found to be damaged.
I retuned the resonances and the notches of all the quadrant and have attached a pdf file of my measurements.
a) The variable inductor on WFS2Q2 quadrant may need to be changed. The ferrite code has come of the solinoid and is just held in place due to friction.. It may be easily disturbed. So though i chose to leave it in place for now, it will need to be replace in case the Q3 misbahaves..
b) In general the frequencies have shifted a bit when I closed the lid of tne WFS sensor head.
WFS1 and 2 have been installed on the AP table and are functional. I am shifting attention to the software.