Why didn't I spot this thread before? Fantastic work GFR! Very nice indeed! Great metal effects, I especially like the wing and air scoop!
There's one thing bugging me though and that's the canopy. Somehow it doesn't look quite right to my eye. So I've checked your profile against factory drawings of this bird and it matches near-perfectly, with exception of the canopy. I've attached an image of your profile canopy with the "official" canopy shape outlined over the top. I quote this as the bubble canopy differered quite a bit amongst different production batches from different factories. But the canopy frame was always the same. Note how the lines of the frame are parallel on the real thing. On yours they taper a lot. Sorry I didn't spot this thread sooner, as it's a bit of a crap timing I realise, but hopefully not too painful to fix being quite isolated.
Other than that little snag, top job! Some of the best Mustang profiles I've seen! Makes me want to pick up my 3D Mustang again (which is not as accurate as your 2D one, I can say!).