Thanks! I hope it can turn out to be popular with 4 Liter brick builds and also some brickless builds.
I received the final parts in the mail and while I didn't have enough time this afternoon to try building the case, I did do some test fits to make sure the sides are flush with each other.
The parts came out mostly well, but the motherboard tray was a little too large in one of the attachment tabs. I had an older version made for the GPU end of the case, and forgot that the tabs were updated, because the tray was made to fit the newer revision.. whoops. This is just for one corner, and I could likely just cut off some excess material with a mini handsaw I have.
To address @W1NNING's post, printing in the desired color is easier to do, but I don't know what kind of color you're looking to get. Sounds like it's not a common shade for filament to print with. If that is the case, you will just need to use the standard procedure of painting plastic (which I don't know much about).
Printing in nylon, while easier to dye, is also more expensive. Depends on the part to be printed, though.