About this detail of the Tiger
This is the turret nose from the kit. There is a small niche in the bottom edge of the armour.
It is correct for a Tiger with a low cupola, such as Revell's kit 03116. But it is wrong for this kit.
You should use filler to eliminate the niche. The real turret had a plain edge, as shown here.
[1] Survey of Tiger 250122, at Bovington museum, by David Byrden