Thanks Beefcake!
So I've got a good bit further with this. The top front corner has been filled in with scrap foamcore and polyfilla and sanded down to a curved shape. I've then used green stuff to smooth any dents out.
I've also sorted out my far side window issue. It's still a bit rough, but when it dries I'll sandpaper it.....either that, or hide it with the end paint job.
I've also changed the engine. It now has a turbine on the front. I've still got a lot of pipes and gubbins to make it more engine-y.
Oh....and I now have a flight stand....