After only 3 iterations of briefly driving GV12 in the OPEN stroke (1000 rpm - stop, wait a day, 500 rpm - stop, wait 3 hours then 400 rpm) 3 hours of accumulated gas from the isolated gate annulus volume was dumped into the Y2 BT module and CP4 (see attached).  This indicates that a "crescent" of O-ring has obviously pulled away but it is likely that much of the total circumference of the O-rings still remain adhered.  As such, we will continue our ultra-conservative approach and operate the motor for only brief periods so as to keep a slight tension on the O-rings that will encourage them to release on their own.   This, being in contrast to opening the valve in one step which could result in the O-rings being pulled from the capturing dove-tail grooves. 

It looks like the ion pump can handle the remaining annulus volumes unassisted by the turbo but I am leaving the turbo+aux. cart running (but isolated) over the weekend.