It looks like we will need to go in chamber at end X to fins IR on the QPDs.  I searched for the beam today by locking ALS, and moving the picomotor for M4 to toward the position that Kiwamu et al found in February (alog 10091).  This was fine for the Y direction, but in the X direction I only got about a quarter of the way toward the old position before the green transmitted power started to drop.  One theory is that this could be the green clipping on the mount for M4 (TMS table drawing).  After a little bit of searching around, I decided move the picomotors back to the position that we had set them to to restore the beam on the table. 

The positions used to get IR onto the LSC PD from February until yesterday were 9267 X 1665 Y for M4.  Today after moving the picomotor around quite a bit, I needed to use 27357 for X and -12616 for Y to restore the beam to the same position.  So these numbers are meaningless as references. 

If you remove the snout from the LSC TRX PD in air, there are two brighter green spots (with two very faint spots below them to form a square, right now the lower ones are clipped upstream).  The one that is slightly brighter and on the side of the PD face that is closer to the chamber is the one that is co-linear with the IR, and could be used as a reference if we decide to send IR into the chamber from this path to align the QPDs.