robot gripper solidworks 3d models

I made this with SolidWorks 2018, using images of the serie as reference. There are many scenes that the Citadel is seen completely from the outside (s1e10, s3e1 and s3e7), but it's always the same shot, at the same angle, so some parts, their size...

I used GIMP instead of Paint.net for drawing the topography; Octave instead of MATLAB for plotting the 3D model; MeshLab for simplifying the meshes, instead of Microsoft 3D Builder; Freecad2 instead of SolidWorks for the tunnel and the World Engine;...