I also grabbed the the Burlington Bulletin #10 tonight to coincide with the studio review.
Just a note.. I can't believe I missed this..
DOH! The louvered air filter door for the main air reservoir that was located behind the cab bulkhead; this door immediately behind the cab doors is not a screen as depicted on the GGD E7 but on CB&Q E7's a shuttered door. The delivery state in 1945 was a shuttered door later changed to a smooth sheet metal door and in some cased completely removed in later years.
...
The photo comparison above clearly shows the louvered air filter door. I think I can change this door, I will see what I can do.
This is "nit-picking" guys... I am just following through with the prototype versus the model thing.. 
Notice the Pennsylvania units came with louvers vs screens. This is most likely an add on part, either plastic or a brass etching, and something else that can be changed easily. And maybe spares sent with the second run to correct the first for those who notice.
