I opened GV2 and disconnected the leak detector -> noticed YBM and XBM turbos had tripped -> I assumed this was due to the gas bump from the gate annulus volume being too high for the, relatively low, safety valve set points of 5x10-2 torr -> Increased set point and restarted YBM turbo -> valved-in YBM turbo -> Increased set point and tried to restart XBM turbo but its QDP80 was also off(?) -> Restarted QDP80 but now turbo trips on vibration at about 75% rpm -> attempted to spin it up a few times but no luck -> This symptom has happened before and has been bypassed by introducing a gas load at the turbo inlet via cracking opening the "up-to-air" needle valve -> I didn't try this now will revisit tomorrow 

Pumping YBM, Vertex and XBM with YBM turbo tonight