BD: Looks good, I too really like the weathering on the gun there.
Cody: Looks like a 190 to me- nice work!
Steve: The Sherman came out great, I love the olive drab paint and the mud/dirt you've got splattered on there.
If I may be a little nitpicky? Judges at shows have busted my chops about stuff like this and then I wondered- 'why didn't people tell me this before' so I'll let you know here. If you think it's stupid you're free to ignore me!
1). The tracks are a little loose, you can fix this by cutting one of the links off and cementing it back together. You probably don't want to do it here since you're done but you might try it in the future.
2) You can paint the tools a dark grey and then rub some pencil lead on them to get a little metallic sheen. Silver paint is a little strong.
3). The area around the left front light guard is shiny. Hit it with a little of the matte finish you used and it will go away.
4). As Bish noted there looks like a pin mark on the spare track link on the hull front. It's in a kinda hard place to fill and sand there though. If nothing else you can do a cop-out and stick a helmet - US, captured German over it.