I found a computer to use for a few minutes. Whew! Computer withdrawal!
It came to me that if I rotate the four I Beams that form the skeleton by
90 degrees (so the H's are standing) and space the parallels with something like very strong standoffs between them, I could take advantage of E/G much better and do MUCH LESS machining.
No CAD here, or I'd do a diagram! Awk!