Light and shadow. Fascinating how chaotic yet structured it is
Well, structural elements are getting easier, highlights and shadows, but th.e wheels were a bit of a challenge, gritting the size and orientation right.
Lousy repair job#4
Started from an imaginary intact cylinder around axis pointing away at an angle to get the ellipses about in proportion, before (virtually) removing the missing fragment and 'gluing' up the pieces. The rest is shading but removed most of the contour lines.