i think you have the same issue i had, the gap between bizeps and forearm is quiet large so a lot of black is visible.
It really does look better if you could move bizeps down or forearms a bit up trust me, i ve been through this aswel.
Just a bit finetuning for a great look.
The fabric of the neckseal should be tugged away aswell since it is clearly visible in the front shot, overlapping the shoulderbell and visible on the other side.
Sorry i am just a picky german guy who went through a hard accurazi school.
And of course its-Just my opinion!
But anyway, a Good build!