4-18 (Friday) activities:

- The corner pumpdown continued: the roughing pump was restarted at ~8:15
- After reaching 5E-1 Torr, the OMC turbo was started up (~15:10). The updated temperature control worked well again, neither the turbo pump, nor the controller did not heat up above 40 deg C during the whole process.
- After reaching 1E-4 Torr, the already spun up HAM6 and X-manifold turbos have been valved in to the volume (16:50)
- The 2 so far problematic annulus IPs are now doing well: at HAM4 and BSC8, the aux carts are ready to be taken off. The one at GV5 can now be switched on with good chances.
- The leak check continued at the X-manifold beamtube: ~80% of it was wrapped - this will be finished on Monday, and so the leak check itself will be also done

Now, as the pressure is <5.5E-5 Torr, WP12439 is closed, so the in-chamber HAM1 work is now possible again. HOWEVER, NOTE THAT HEAVY LIFTING IS STILL FORBIDDEN - and hopefully is not needed anymore.