-in a RHBH I brace my left/trailing shoulder on the right/brace leg. This makes my entire shoulder unit a lever on the "swing side" of the throw, and the hit point is way out front since this is a one handed swing and the trailing arm doesn't need to be attached.
Here is an illustration showing how I was thinking about tilted spiral compared to what I now am seeing and feeling.
I thought the tilted spiral was the spine axis, and how it pivoted/swiveled targetward with the butt countering the chest/shoulders. This is as in the McBeth image.
Now I am feeling that the tilted spiral is actually an imagined axis from rear shoulder to plant leg, and it allows the entire shoulder unit to be the first lever of the pendulum.
If this is correct, I've been essentially missing an entire pendulum multiplier, that also happens to be the first pendulum of the sequence and a long one as it's the length of my left shoulder to right shoulder? This would almost be like comparing a beginner who rounds their throw to my current form that has the upper arm to elbow lever added...and why pro's have another 100'+ from me?