I completed install of the beam splitter and extra beam dump in the MC REFL path on IOT2L this morning (see attached pictures.  Cheryl's alog also has a good one).  This is for ECR E1500210.  It should be noted that with this setup we cannot put more than 100W into the IMC.  When we turn on the PSL HPO (starting next week, April 4th) we have to be sure to limit the amount of power going into the IFO to <100W; we have discussed a 60W limit for the duration of O2.  Since we can't alter the laser power to this low level in the laser itself, we will use the HWP IO_MB_HWP1 located directly after the PMC to limit the maximum available power to the IFO.  Once we begin using operating powers in excess of 100W we will have to come up with another solution for this.

This closes LHO WP 5783.