(Jim, Chris, Giacomo, Douglas, Gerardo)

We installed the REFL parking beam viewport, first the aLIGO IO reducer was installed, part number D1201195 on port D8 of HAM02, on top of the reducer a viewport was installed, assembly D1101670, the following just for posterity, we used 5/16-24 x 1.5", 12 point, silver plated bolts to hold the assembly to the reducer.

The viewport is now covered with a viewport protector and a safety cover (yellow type).

Leak check needs to be performed on this viewport.