Looks good... as for the rectangle work though....
Cut the armour lines drifting to the back out of the rear armour first.... then use Plastic card glued into slots.... then fill in with Green Stuff to level, use sculpt complet the recess around the armour plate....
Anyway, what you have was easier and looks just as good, or maybe even better... I would add a gem though.
GS on turret worked out really well, good job there... and I do understand about the pilots... they are sort of Humanish...
Cheers