Looking very good, especially considering the size as well. Back in post 29 you showed a scheme with a black or dark gray rectangle around the exhaust/fan area. That broke up the roof expanse. And rather than trying to put a curve in the roof color at the front, put a V point in that rectangle on the A unit to match the V of the windshields. Dullcote that area as well and smudge around the exhausts with black powders/pastels.