Richard,
I think you've done a great job capturing the character of the vehicle.
If I may, I have just a couple suggestions.
1. In the first picture, there are very obvious seams on the rubber portion of the road wheels and on the springs and their supports. Removing them would make the piece look a little more accurate.
2. In picture #2, where the port side plate (the one with the star) joins to the front plate (the perpendicular one), there appears to be a slight gap that should not be there. Try some putty or gap filling super glue and some sandpaper to close up those pieces.
Lastly, I'm curious: Above the circular #5 decal on the front of the hull, is that gash supposed to be there?
Keep up the good work!
Gip Winecoff