Normally I don't have time to stop and take pictures when I'm in the process of building something...But this once because of all the great mentors here on the board..Dr. Phil ..fynsdad,,,dgsselkirk...Tomhugill...Panzer Ausf G....Painless..sassgrunt....Dragon254..Jarndice...to name a few
I've seen all of your work... and it has inspired me to push a little further
I give you KATYUSHIA 2...the build
First the hatch had to be modified from the two part to the half moon
I did this by using a PANTHER inner bogie..rounding it with a drill till I achieved the correct diameter...then chopping up the dual hatches to retrieve the hinges
I used milliput to increase the thickness of the hatch till it was even with the plastic from the two piece hatch
thus the almost finished operating hatch...aluminum tape used to seal the headlight and as you can see I hinged the deck lid
I used RC airplane hinges.. the length of the segments were the same as those fitted on the tank... chose to do two and not the whole length...because there was no need to...I had to groove the deck lid to the hinges would sit just right... then cut two slots in the hull to accommodate the other half of the hinge...need to do more work on the inside ... and put some kind of screens on the lid so I didn't secure it down...then I will cut the remaining tabs off the inside and secure the hinges to the hull
as you can see the hinge segments look close to the molded ones
There you go Gentlemen
Enjoy
ALPHA
One thing for sure dgsselkirk... that tank has a lot of rails... didn't go with the plastic ones because of the length... I figured one false move and it's gone lol.. so brass was the best substitute... after doing two tanks... I regret not making a jig 
...reason I thought someone sold them seperately 
...So I went with what I used for my JAGDPANTHER...here's the result ...be kind 
