Is the 83% ridgeline (RL) length part of striving for a flat lay or is that number just a starting point for a consistent hang with the 30 degree angle, or are those two both the same?
What if the user likes having his head higher than his feet? In a conventional bed, I sleep better with my head on two pillows. In a hammock, I've been using a barely diagonal lay to keep my head higher. Haven't tried a RL yet, but I do count my steps when choosing trees.