Is there a way to "eyeball wind tunnel" it? I tend to have a, what I'm assuming to be, less than ideal position. I tend to ball up and arch my back a bit (first picture), but I've gotten better and flattening my back out a bit. But, with this arch, would the P-09 (with a longer tail) be a better choice? Or would it likely be better to use a shorter helmet like the Aerohead? Is there even a way to make an educated decision?
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