Just a quick note becuase this investigation isn't quite complete yet, but I can improve the recycling gain by moving the SOFT offsets in pitch after moving the PRC1 pitch offset.  I have not yet tried adding yaw offsets to this.  With pitch only, I can get up to 30 at 50W (previous record was 28 at 50W). 

What we'd like to do after finding a semi-good spot is to move the beam spot on some of the PRC mirrors (see Stefan's recent alogs for scripts that do this), which will hopefully let us move the spot on POPA back closer to the center.  I wants to be at least 0.65, which is getting uncomfortably close to the edge.