Thanks for the feedback guys. I'll look at increasing the hinge shadows on the control surfaces.
BTW one thing I've found on the Ki-61 is that since its a 2048 res fighter skin you have to increase the opacity of things like the panel line layers a lot compared to a big bomber or a 1024 res fighter otherwise they don't show up in the screenshots.
I hadn't changed the normal map for this skin from the one used on the default Ki-61 but I did reduce the fabric grey paint specularity and power so its less shiny. I suspect its a combination of this reduced specularity, the screenshot angle and the camouflage disguising the pattern. So I have now increased the fabric dip effect on the normal map and reversed the specularity change on the fabric effect. The viewer screenshots below show the fabric effect with and without the skin:-
