Lewis,
A few errors that shouldn't be too difficult to correct.
You are missing the three brackets that go into the holes on the front of the Main Gun Mantlet:
Should look like this (image from Prime Portal):
The other item is the last skirt over the drive sprocket on the port/left side of the hull:
This small skirt is only attached the the #6 skirt via a continuous hinge and a pin hinge to the rear skirt plate below the taillight assembly. If you remove the #6 skirt, the last skirt would flop around and possibly even sag into the track. This image shows (it's the starboard/right side but otherwise the same) the continuous hinge on the #6 skirt and the pin hinge connection to the rear skirt plate (picture from Prime Portal):
This image from Prime Portal shows the #6 with the last skirt "opened":

The Loader's M240 Skate Rail is Stainless Steel (image from Prime Portal):

Finally, the left headlight (from the front) is missing its guard brackets but also the tow pintle bracket, which is welded to the hull.

The headlight guard bracket can be unbolted, but I believe the thicker tow pintle bracket (rounded with two holes in it) should remain unless it has been torched off (image from Prime Portal):

Just trying to help...