bandit111964 wrote on May 31
st, 2026 at 9:29am:
Would the goal then to maximize the throw be to perfectly match the body spin axis with the sling’s spin axis?
One modification, 'release axis'. The sling can spin wherever ahead of time, it's the final movement that's important. Although if we're focusing on distance slinging with thin corded slings, it can be more difficult to change the plane of the rotation quickly. So pre-rotations in the same plane (or very close to it) are beneficial.
bandit111964 wrote on May 31
st, 2026 at 9:37am:
spine axis and sling axis are NOT aligned.
I wouldn't worry too much about getting things perfectly aligned. Unless you're doing some weird hunching or limbo posture, your torso is going to have a pretty much vertical axis twist (like you show in your picture). If you're slinging with an upward angle, the rotational axis of the sling may not match exactly. But I think trying to rotate your body at an off angle would just result in injury or a loss of power because it's not going to be stable. Not for me anyway.

The biggest thing to keep in mind is that matching body and sling rotation isn't exactly the goal, but rather a method (that can help) to get there. The goal is to have a long power stroke so the pouch has maximum time to build up speed. Having the arm and sling following the same rotational axis helps take advantage of the body rotation to build speed.
But now let's touch back on overhand (I'm using overhand as the term instead of Figure 8). We already covered that Figure 8 has a fix rotational path. But a very similar release can be done with pre-rotations of the sling. If you haven't yet, watch some videos of Channing (Practical Paracord). He rotors the sling behind his back before pulling forward to throw. His style (and I'm referring only to the sling's movement) is basically the second half of a Figure 8, with the rotation behind the back being where he uses multiple spins until it's time to throw.
But he does something else too. He obviously rotates his torso, but he also has a big front leg kick (step) to give him a lot of forward movement of the torso. Channing also comes from a baseball pitcher background like you (in case you didn't know), and it's very clear in the way he slings. With the pre-rotations, the nice overhand release like Figure 8, and the big forward movement he generates with his body, he gets a ton of power. This video is great if you just want to see his style without a bunch of other video craziness going on:
https://www.youtube.com/watch?v=Of7OHjCCMxU.
If we were going to do some speed tests to compare a slinger on flat ground vs. on a pitcher's mound, our boy down in Louisiana is the guy I'd want doing it. I could definitely see that additional downward movement aiding his slinging style. Now a sidearm release....maybe. But I'm not as convince on that one (without seeing a test). I'm thinking I have to reach out to Channing and tell him we have a video idea for him.