Not too bad to rebalance but only because everything needed was in the LVEA.  One of the four 10Kg Optical Table Masses(D0901075) had to be removed as there was so little wall mass on the West side of the ISI walls.  The bottom mass of the two stacker was removed and the upper damped mass was moved to the table top onto the damping viton.  So all three masses remaining on the table top are unbolted and resting on viton damping pads.

The total mass reduction of the Balance Mass Payload is 3.5kg.  Will update the drawing for this as-built.