A few days ago Jenne mentioned that our IM4 Trans NSUM diode was reading lower than before, because it was badly pitched down on the QPD.
IM4 TRANS is used as our PRG calculator, so we would like make sure it's a trustworthy readback of our input power.

This morning I adjusted IM1, IM2, and IM3 such that the alignment onto IM4 Trans is repaired.
This brought the IM4 Trans NSUM estimated power incident on PRM from 1.8 to 1.9 W.

We are now back to similar levels on IM4 TRANS / IMC PWR IN we were at at the beginning of the run:
Current IM4 TRANS / IMC PWR IN ratio = 0.96
Ratio on August 8, 2023 = 0.95

I was never able to find an alignment which 
1) maximized our detected power and
2) properly brought our YAW on IM4 TRANS back to zero.  
Right now, IM4 TRANS YAW is sitting at 0.4.

Because of max power/YAW discrepancy, I walked significantly in a bunch of directions (IM1 + IM3, IM2 + IM3) to check for clipping on the IFI or the post IM4 path.
I did not find anything obvious, so I suspect we are okay where we sit.
Still, we should be prepared to have to massively adjust the input alignment using IM4 when locking later today.
If we need to, we can revert to the IM alignments from 8 am this morning, and simply pico on the IM4 TRANS path like we did in alog 64446.


alogs:
August 2022 Picoing onto IM4 Trans alog 64446
July 2022 IM4 TRANS calibration alog 63812


EDIT: After this, because we were more worried about locking, I restored the sliders to their original locations, then further restored all of the IMs OSEMs to close to their original locations from before the vent.  
Somehow, we are still falling off IM4 TRANS.
Additionally, Daniel advised to look at the ISS QPD, seems like we are not falling off that one yet, but are significantly yawed, not pitched.  
I believe that this actually makes sense, and that ISS QPD was 90 degrees rotated compared to the other QPDs.
I'm now in the process of checking the IMC OSEMs.

EDIT 2:  Mode cleaner OSEMs seem close to their original values from before the vent.  It's very hard to tell what changed about our input alignment, if the IMC and IMs OSEMs are at the same values.  
In any case, I've left it at the same slider values we had this morning, with the loose plan of slowly aligning IM4 TRANS during full lock with the input alignment loops on.