Here is a rendering, a few months old. It's an old wrecking ball. Marker, pastel, and colored pencil on 11x17 cold press illustration board. Took 8 hours or so.

The photo really doesn't do it justice :/

Composition practice. These are 9 inch aluminum wire armatures covered in soft micro-crystalline wax. The board is about 10 inches square and has holes drilled in for sticking the feet in place. These are super handy when drawing multiple interacting subjects.