See, another new poster. Yes boy and gals, the forum is still alive!
First off welcome friend and thanks for taking the time to post your Tiger.
Can't believe it's your first model! Very fine results too. I like the efforts at the chipping. One word of advice for the future, the muzzle-brake wouldn't be blackened as you have it now. I too made the mistake due to artistic licensing from other builds.
One other thing I'd might do is add some streaking to the turret and hull or some pinwashes, especially on the lower hull. My thinking is the lower half in particular would be more weathered as it's so close to the ground, thus getting dirtier.