Today, the guys finished fully suspending the glass MC2 and took a preliminary look at it's height and pitch alignment.  With the optical autolevel and a height guage (standard HXTS alignment procedure), the height measured to be at nominal (214mm to better than +/- 1mm). 

The roll of the optic is out by 0.8mm over the distance from the left prism to the right. 

The pitch was measured via looking at the pitch of the side scribe line on the optic (which is known to be crooked by ~0.1mm over it's length) so is estimated at ~4.5mRad.  Independently, an optical lever was set up near the top edge of the optic (above the FC, so yes, high on the 27m ROC surface) and the pitch again measured to be 4.5mRad +/- 1mRad.

We're not sure what the IAS requirements are, so we'll need to find those before determining what errors to improve.