A quick update. I fixed a lot of the bigger shapes. Adding smaller parts helps me a lot to understand the entire structure. I can see how the shapes are getting closer and closer to the reference images. A lot of areas that appeared symmetrical at the first but aren't actually. E.g., the number of modules on the left and right and the central cylindrical axis. Getting the shapes right is an evolution and takes time. But images tell more than words.
Did you know that you can change the visible collections per 3D view? This is super handy.
