About this detail of the Tiger
The model's artwork depict Tigers "141" and "121". Their tactical numbers are drawn in red with a white outline. The instructions tell you to use red decals for Tiger "141".
However, dozens of original photographs suggest strongly that the 1st Company, including these two Tigers, painted their tactical numbers without any fill (The 2nd Company used a red fill).
You should use hollow white-outlined digits (provided on the decal sheet) when modelling any Tiger whose tactical number begins with "1".