John, Just finished one, a C5M version. Words to the wise:
Like you bought up, do not spend too much time on the interior. While nicely done, you can't see squat even with the canopy off. With it, all that can be seen is the machine gun.
The decals. VERY delicate, do not use Solvaset. Even " Mr Mark Softer" melted them easily. You have a bigger problem as your civil version I'm sure depends heavily on decals. Then when I applied the tailcodes, without any solvent, they silvered like a sonofagun. I would try the Microscale setup first if you have it. Use caution.
On a positive note Those Dead design masks worked really well correctly sized, stuck well, no residue.
That is a really nice looking aeroplane, hope it works out, look forward to seeing it.