This set focuses on the Mars gear assembly, providing essential components for the planet Mars’ gear train. • Designed for the complete working Orrery model. • Issue 13: Includes gear for the planet Mars’ gear train.
When I ordered, I was a bit skeptical. My fears were unfounded. The quality of the pieces is very impressive. The finish is bright and each piece feels weighty and strong. It is an intricate model and it is built to very close tolerances. The planets clear the mechanisms by no more than 1/16th of an inch but it was easy to keep everything aligned and working smoothly. The manual is printed on high quality paper and easy to follow. A class presentation and product. I couldn't be happier.