The nervous system has the most guess work and the most work period. I added the nerves for the mouth, additional smaller antennae, penis, the skin and the muscles of the foot. The positions will probably change during the rest of the process. Mind you, this model is still an approximation of the real anatomy and that will not change. But the positions and the complexity does reflect reality.
For now all organs have a “false” color to be able to distinguish every structure. In the final model I will probably do that too, but for the app I will make out of it, I will try to give it realistic textures. The collection can be found here: Helix pomatia anatomy progress