I've decided to make a couple of templates for Bf 110 skins and have noticed some bugs for both shapes in the skin viewer. I haven't checked to see whether any of these carry over into the game.
Both 110s:
The props and spinners vanish when "Running" is selected.
Only the RH gear doors animate on both nacelles.
Bf 110C:
The ETC500 bomb rack is shown fitted to the plane but cannot be removed. It should be a pylon option.
Bf 110G:
A skin rather than shape bug. The upper part of the nacelles internal gear bay is light blue and not grey as it should be. The grey coloured art for this area has not been painted onto the lower surface of the wing like it has on the 110C art.