Today started with removal of the HAM7 +X and -Y doors, WP 13283.  These were already on 4 bolts/piece, so removal was relatively quick.  Nothing to note other than the usual O-ring sticking business. The 2x 12" CF blanks on the +Y door were also removed for ISI locker access.  Since the final cleaning happened ~1 hour from door removal, particle counts were very minimally elevated, 40 @ 0.3um and 20 @ 0.5um (see pic).

We then moved on to the X-beamtube manifold vent work, WP 13284.  The X-manifold turbo pump was valved out.  We then cycled GV7 open, then hard closed again.  The GV opened at 10 psi, and hard closed at 20 psi, so we believe the piston O-ring replacement is working well.  Then, the X-manifold vent was started.  After burping the system a few times and confirming there was no communication past GV7, we started venting the manifold section.  We noted that the Kobelco's duty cycle seemed to increase audibly as the pressure in-vacuum rose, which isn't surprising given that we have 7 doors and 2x 12" ports open on the corner volume, so we elected to keep the vent slow, maybe 5 torr/minute.  We stopped the vent for the night at around 400 torr.  Tomorrow, we'll finish venting and open GV2.