Finally I've exported the T-45C model into FSX - and needless to say I took it around the boat for some traps. I'm very happy with the quality of the work so far. Most of the external model is done, the main outstanding area being the cockpit and the canopy.
Soon I'll start working on the virtual cockpit. It is not yet clear to me how long it will take, as I cannot say how many parts can be reused from the previous version (which has several inaccuracies). But the external model is just few hours from being done!