Cool G

Well heres some Red Pen for you with some thoughts, put greeble stuff all over, not tons but just a few for visual interest especially around the pipework and on the ends of them, make them 'connect' with other objects around , so they sit together .

The side supports - can they go thinner, maybe half of what they are now, this way it will give a bigger scale to the whole vehicle.

The struts on the top, imagine an old aircraft wing without the skins, maybe add a pipe or two running randomly along them.

Cool stuff
Cheers
Jay