Hi Mark,
I remember building that kit when i was a kid, I still have it in a box somewhere. It's great to see older models given TLC and modern techniques, and this one should look great when those markings go on!
One point -- the Phantom was of course an area-ruled design, so it was meant to have at least some 'wasp-waist' effect to the fuselage. It's fairly apparent on most of the marques, though the bigger engines in the British birds pretty much put paid to the effect, which in itself would have contributed to them being the slowest Phantoms around. Do you feel that Airfix took this characteristic too far in their tooling? Or were the parts just really warped? :-)
Cheers, Mike/TB379