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LeeD said..
7 is far from "perfect".
Im not saying a 7 stance is perfect, I'm saying a perfect 7 stance is the most efficient stance.
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LeeD said..
Straight knees and hip is not good.
Slightly bent is better.
Slightly bent at the hips is not better, its a little bit more controlable, which is better in some situations, as straight is in others. I have touched in this quite extensively in my comment.
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LeeD said..
Front arm is not horizontal in a good stance.
I've never said anything about horizontality of the front arm, I've said it should be straight, which still holds.
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LeeD said..
Slight hunched shoulder is good, as is level head.
To be honest, I'm not yet sure about whether hunched is good or not. I often ride a little hunched with a more level head, as you say. In one of my latest coached training sessions we had a debate on this, with a PWA slalom pro (who are so way out of my league in terms of skill I wouldnt dare arguing against them) taking the shoulders arched back side of the discussion when talking about efficiency. However, this is hard for me to implement in my own technique, and as long as the weight is maximally in the harness I dont feel much difference. I think arching shoulders back can be a helpful tool to learn to extend yourself from the kit and put your weight in the harness where it belongs.
With 20" lines having your shoulders hunched is bad in any case for that would mean your arms are even further apart on the boom and your center of mass is even closer to the rig than the 20" lines already make it be.
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LeeD said..
Arms should be fairly straight, but a slight bend to allow absorption and adjustment.
You dont have to absorb much of anything on a foil, especially when freeriding. In terms of adjustment: If your front hand is next to the harnesslines you shouldnt need to ever have to bend it as its on the rotation point of the sail. If there's a gust you cant handle the sail opens automatically, if the gust is too much you can shift your back hand back to compensate.
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LeeD said..
Shoulder width is a good starting point, and good for ideal conditions, which we seldom get.
I've touched on this here and in my previous comment, the backhand position should be variable depending on power. Shoulderwidth is the starting point and should be the most favorable position most of the time during the session, otherwise your harnesslines aren't setup right.