Andres R. and I completed assembly of the first two Beam Splitter Upper Table Cloth subassemblies this afternoon. No manufacturing or design problems were encountered, (all parts fit together and all holes were of the correct size and in the right place). 

Assembly Notes: 
(1). The ECD Blocks are still a bit tight fitting in the mounting bracket. Alcohol and rocking the ECD Block helps it slide into place. When adjusting with the jacking screws, take care to keep the ECD block parallel to the face of the mounting bracket or it will jam. 
(2). Adjust the side plates to their full width to allow the installation of the Top Mass into the Table Cloth assembly. 
(3). Run the four bottom 1/4-20 Helicoils used to fasten the front and back plates to the side plates in from the bottom of the side plate to their full depth. The 1/4-20x1 SHCS used to bolt the plates together will not reach the Helicoil, if they are not installed to full depth.