Bow -
Cool find. The half-cap has "virtual" 8 degree slope :
I haven't read the document, but I would ask why the truck wheels are "floating" above the ground. There is also a debate as to whether or not to include the wheels, because those are not a "continuous" element under the car. Fred Flinstone cars *do* use cylinders instead of wheels, so those would qualify as continuous elements.
Maybe I will plug these images into
Flow Illustrator for fun. If I do, I will remove the wheels and lower the car.
CarloSW2