About this detail of the Tiger
The kit correctly provides a loader's periscope of the same type as in the cupola. The dimensions of the periscope are correct. But the periscope does not protrude quite as far through the roof as it should.
Cut away some of the supporting frame on the inside of the turret roof. This is not an accurate detail in any case.
The periscope should protrude a (scale) 45mm above the roof.
You will have to sand down the periscope cover, which is too thick in any case. The real thing was 20mm steel.
[1] Factory drawing 2AKF31861U1B12: Turmgehause (turret front plates)