After a long hiatus, "Ask Professor Hammock" is back, eruditely answering questions from viewers (Noob, Dutch, and Skeptic) about the Single Ring Suspension, particularly with respect to a comparison with the Whoopie Sling. He shows how the SRS works, the impact it has on Amsteel cord, and tests empirically how well different devices and cord types work---or don't. Finally he cranks up some computer simulations to analyze how much benefit one gains from a foot and a half shorter minimum length between trees.