Hi,
That's a nice build, but I also echo the nitpicks previously given. I also don't think you overdid the weathering, in fact I like the mud effect on the tracks.
Some of my nitpicks if you don't mind:
1) You either forgot to paint the tracks or intentionally did not paint them. The grey styrene color is still showing especially in the insides. Just fix them and then post an update.
2) Some of the paint chips on the turret looks artificial in my opinion
3) Some of the rust effect on the turret looks out of place. Consider relocating them in corners where you think metal surfaces would have been damaged.
Overall, it looks very good
Cheers