• Rotating the cam by "hand" (entering a new slope and re-solving) is fairly tedious. It should be simple to write a macro to do this.

• Try this example with pd_resolve_merge_tolerance set to the default value (1E-6). Rotate the cam until the follower comes to rest at the very top of the cam profile. What happens with the very next rotation?

• Try to replicate this example without using rigid bodies. How many constraints are needed? How would you force the hatching on the cam to rotate along with the elements?