As I started to assemble the first panel tonight, I found yet another mistake.  I ordered two of the larger panels incorrectly. In this case, it was an error when I rolled up the various Parts Lists into a to-purchase BOMs.  It was an extremely unlucky typo - neither of the two panes were the correct size. 

Ordered:

• 2 ea 640 x 470 mm panes

Needed:

• 1 ea 670 x 470
• 1 ea 670 x 570

I will plow ahead building what I can, new panes on order, should arrive before Friday if I'm lucky.

Repo updated with revised BOM.