In the past few weeks we've made a few temporary changes to the guardians that we intended to revert when we start running.  The first was commenting our the shuttering of the end station green, alog 20484.  

The second was that we had a path to avoid closing the beam diverters in the corner on the way to nominal low noise.  Both of these changes have been removed, so that now in nominal low noise the beam diverters and end station shutters will be closed.