Very nice build. I'm currently working on a Hasegawa P-51K, which has the D parts included, and is being built as a D. My build looks nowhere near as good as yours, but I'll be watching in the hopes that I'll get some good pointers.
As an aside, are the cockpit sides molded into the fuselage on the Tamiya kit, as they are in that company's F4F kit? Just curious, as the Hasegawa P-51's cockpit sides are separate pieces.