Echo what the other guys said, every picture you see of the M-10 in the field, they look like dump trucks. Tons of stuff everywhere.
Also, maybe do a dark wash and some drybrushing on the wheels and tracks. Hull and especially the turret look super, but the wheels and bogies, etc.. look a little more one dimensional. Could be the lighting?
Thanks for the inspiration, beautiful job, inspires me to work on one of my M-10's...
Scott Gentry