Beautiful build, but the tracks on an M48/M60 series tank are as tight as a supermodel's jeans. Absolutely no sag in the track at all.
Secondly, the headlights should be painted clear on the right side (as sitting in the driver's hatch) side and infrared (gloss black is a good match) on the left.
Third, only the upper lens on the left side tail light is red. All others would appear black.
Lastly, the spare tracks' metal parts would not be silver. They would be black (the real tracks are coated with a tar-like substance) or if the track was used, the would have a worn dusty metal color.