I've been playing around with this thing for the last few months as time allows. This is a really great kit with lots of potential.
One thing I didn't like was the marine up front so I replaced him with an automated turret and put him back where he belongs next to the pilot.
I also replaced the rear wing engine things with larger wings more like the tempest. I figured that the big engines at the back are more than enough for forward propulsion without the need for four additional thrusters.
I'll probably add some kind of additional protection to the gunner like a fold down shield like the pilot has and maybe some kind of HUD.
Still umming and arring over how much detail I should add to the hull before priming like eagles and so forth - this is for an Ultramarines successor chapter so wont have Dark Angles stuff on it. I think the little robed statues on the cupola are small enough to pass off as generic robed warriors so kept them.