I think that thing is awesome as is! Maybe add a little black somewhere besides the hatch (more guns) and change the disk color to something lighter, as it doesn't seem to match the rest.
I do have to ask to see an interior view so we can see how many minifigures it holds.
Yeah the entire hatch and a bit of the color scheme will be changed along with the design of the M2 Browning machine gun (which wasn't shown). I'll get right on those interior shots.