Part 1 is here:
The scenario in itself.
It took 95 turns for the Germans to find the object and exit.
The device lasted (surprisingly) up to turn 79. Which means only 6 double in 79 turns!
I used a special deck of cards represented every single tile of Space Hulk to draw the abandonned underground base. So I could not know its layout.
Visibility in the base was limited to 6 squares.
Every time a living would lose a fight against a zombie, I rolled for "Harry are you ok?", if failed, he would turn zombie in 2d6 turns.