Interesting comments from Brad but sort of makes sense given that the Assassin, and maybe the Ambush too, was intended to be used in combination with a harness, not a saddle. Brad's harness requires the user to stand/lean at all times. Sounds like I'm giving myself a reason to spend more money and buy the harness
As for the flex, the Assassin did not move at all and I assume its because of its beefier build. The flex wouldn't bother me if it didn't also bring about the noise.
I don't want to put words in his mouth, but my understanding is that he does not use a conventional saddle, but a harness that is made to support your lower back as you
lean. I believe he was behind both the assassin and the ambush.
@mattsteg is kinda right. It's different than what most of us are doing. Pros and cons to both systems. I think they're both quite comfortable. I give an edge in maneuverability to a conventional saddle and a ring of steps. However, if you're going to use a platform, to me it absolutely makes sense to use a bigger one, lean, and have a harness made to facilitate that. If you don't like your feet on bolts, suffer from hip pinch, can't shoot your weak side from a ROS, and prefer to lean or stand on a traditional hang on, then the ambush makes a lot of sense.
I do 90% of my sitting and shooting from a ROS from 3 steps. I like having steps all around the tree just I case I want to reach up and move my tether to face a different direction. But I don't swing around the tree to hide from deer or make my weak side shot a strong side shot. On a normal tree, I can shoot any deer from any angle in either setup.