We moved M20 back to the T2 monolith and re did the connections for air + limit switches + T2 profile monitor air.

Note: T2 profile monitor electronics sparked when we moved M20 out initially. (Update: Shengli Liu from probes group performed a test on the T2 profile monitor electronics on Mar24 and found that they are working properly)

M20 started leaking when we tried to bring it to vaccum - from the monolith o ring seal and not the main shaft seal - will look to correct on monday.

Verified through measurement that the replacement o ring was the correct size (#268 0.139" diameter compared to the 0.131-0.137" that was remved - likely shrunk over use).

Update (Mar 06, 2023): M20 was lifted ~5 in above the monolith flange and we identified that the leak was caused due to damage to the o ring (image attached).

The o ring likely damaged when M20 was brought into contact wit the monolith flange, lifted up again, and brought down for a final time before vaccum check.

The above procedure was done because the flask tends to stall close to the lowermost position and prevents unlatching unless lifted systems are lowered fully.

This will be noted in updated procedures.

 T1/T2 valves were not leaky still (only a few droplets) - pending T2 cooling system pump on for final leak verification.