Thank you, I am glad you like my efforts.
Lance, for Feldgrau I used WW2 RLM02 from Pactra acrylic range. Shading is actually postshading with custom made thin smoke, a mix of much Clear and little Black, also acrylics. Gotha has no rib tapes on the wings, just stitching, so I used the thinnest available Aizu tape 0.4mm but the effect is barely visible, what you see better is the contrast between inter-rib bands and ribs themselves.
