I had 2 ideas to suggest
On the top piece, make the top right corner rounded instead of a 90 degree so its the same style as the other corners.
Have you also considered making the top and side pieces reversible? This would allow having 2 sets of logos for the case that you could switch between by flipping them.
Yep, the other corner will be round. It was missing in proto.
As for being reverssible, i'm not sur because the plate cant be counter sunk both sides... Unless i dont do it
My Arcade collection - I'm having fun creating aluminum cases, if you're interested to look at them or have one, drop in have a look !