it will get better....
the frame is now shrink down to 300mm thick (it was 1200mm before...)


here's a section of the beam cutting through the water inlet valve system...

also, I am trying to develop the intricate 3d frame (ventilation) within each frame...I know what's shown here is not appealing at all but I will make it better...
here are some of the reference that I have been looking at:
NASA docking system - where mechanical and structural support is provided through the rim

and for the electric power connection between the cube and the frame, I think the inductive charging of electric toothbrushes maybe useful...

