Removed existing viewports and replaced with blank flanges with the exception of (1) each 10" to 2.75" zero-length reducer which was needed to re-mount the gauge pair that was left over from the BSC6 removal.  I am pumping the Y-mid overnight and will leak test the new flange joints tomorrow.  

Expect pressures to rise in both the Y1 and Y2 beam-tube modules as neither have a means to pump hydrogen while in the current VE configuration