Updated 5/25/2018:
I started attaching table tops (surfaces) 1, 2, and 3 to the framework. First thing was to move the framework into the corner, but not so close to the wall as to have no room to maneuver. The surface on the left is #1.
This photo gives you a little better perspective. It will end up in that corner eventually.
All three tables are in their rough positions. No. 1 is to the left; No. 2 is at the back, and No. 3 is in the foreground. I find that no matter how precise I try to be, these never fit perfectly together. I guess I just have to live with my OCD. 
In this photo, all three tables have a few screws holding them to the underlying framework.
Here's a look at Tables 2 & 3. I'm about to drive many more screws into table 2.
Here's a better perspective on today's work.
Next steps will be to move the table into the corner, adjust the heights on the glides, measure with the laser level, attach the poplar wall supports (you can see them lying along the baseboards), and then attach the table to the supports. I think that will wait until tomorrow or later in the weekend.
George
