Nice tauchpanzer you have here.
Some questions however.
On the ausf D there is a cover over the turret front and the rear part of the gun, if the antenna "guard" (it is not the right word but I forgot the English name of it) was removed than you should remove the ring attachment of it around the barrel or are you going to place it?
If the panzer is ready to go in the water are the periscope openings in the commanders cupola staying in an open position or have you to seal them?
Are the ventilator openings on the sides of the motor compartment open or closed