Both End Stations had their  PCAL Reciever modules pillaged for Integrating spheres. They were taken to the lab and measured against PS4 on the lab bench for the first time in..... at least 4 years. 
Preliminary Results found here: PSEYRX
And Here: PSEXRX.

Set up notes:
python pcalRRSO4_measure.py \
    -DN1 PSEXRX \   <-Power Sensor  from EX's Receiver side.
    -DV1 8018023 \  <- This KVM is getting the signal that we usually get a temperature signal from.
    -DN2 PS4 \ <---- this is nominal 
    -DV2 8002111 \ < - nominal
    -DT2 1421891 \ <-nominal 
    -a yes \
    -x \
    -log 'PSEXRX_PS4 PSEXRX front track PS4 on the rear track' \

These measurements were ran without a temperature measurement as they do not have an AD590 to read from. But rather the script just assumes the temperatures for both spheres are the same and just used PS4 temperature sensor.
I used the PS5 Kit to set them up (Satelite box, cable, & accessories.) plugged in exactly the way I'd set up PS5.
Read the Voltage off of what would normally be the temperature KVM as it is nominally plugged in. The reason for this is because I was surprised to see that the KVM that we would normally get temperature signals from PS5 with would change voltage readings when the Sphere was exposed to Laser light....  I Also noted that this Temperature KVM had a Higher voltage reading that the normal KVM we would use to read the voltage from PS5 . Infact the normal Voltage KVM is half of the voltage read by the Temperature KVM. So I chose that one for a better signal to noise ratio. Is this the correct value. I'm not sure yet. but we will find out.

I ran this over night running multiple measurments. 


Another  Note: The PCAL Laser Chassis at End X has been showing a Red LED that is not normally red and Labeled "I limit" or "l limit" either way. The First time I saw it was right after a power outage so i thought it was just a weird one off sort of situation. I just powered the laser Off and back on again and the LED went away.
But I saw it had happened again yesterday, and power cycling the Chassis did NOT resolve it. I checked the MEDM screen and saw that  H1:CAL-PCALX_LASERDIODECURRENT was jumping around 9.7-10.0 Amps. So I simply changed the voltage a little and brought the voltage back up and it resolved the issue. l limit was no longer lit. Checking on it today and it seems to still be functioning normally now.

All spheres are now back in their Nominal configuartion.... bolted to the IFO.