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How high does the nose have to come up for it to count?
I think if it goes about as high as your knee it’s fine
Just start small and each time u attempt a tailpress flex the front higher and higher keep doin that till you’re comfortable saying “I can do a tailpress”. Good luck. And keep trying. I hope this helped.
Just keep your posture and feeling right. The shape of board is different depend on rocker and how it flex so result not be the same