Check ResourceSpace for the photo collection of last week's cartridge move.  This is the one-arm test cartridge that came out of BSC 8 early in October 2012.  Once on the test stand in October, the ISI's folding mirror suspension was transferred to the neighboring BSC 2 ISI and re-christened as the beam splitter suspension while the quad's position was adjusted on the BSC 1 ISI.  SUS locking photos courtesy of Jeff Bartlett.