Jonathan is the best kind of GrabCADr. He offers advice on designs, creates models that help others join design and engineering challenges, and shares his CAD knowledge. We got the chance to learn about his project, Dirt Force Motorcycles, and how he got started with CAD. How would you describe your work? I would describe myself as well rounded. I am one part artist, one part inventor, one part designer, one part engineer and one part mad scientist. If I …