Yesterday, the PRMI alignment was kind of bad, so I walked the PR2 and PRM alignments to move the SPOP18 level back up to ~70 cts. 
After this I set the offsets in the POP VAC QPD filter banks (after normalization by the sum) so that 
0,0 would be the good reference for initial alignment:

controls@opsws4:~ 0$ cdsutils read H1:ASC-POP_A_PIT_OFFSET H1:ASC-POP_A_YAW_OFFSET H1:ASC-POP_B_PIT_OFFSET H1:ASC-POP_B_YAW_OFFSET
-0.03
 0.23
-0.32
-0.27