I'm curious about the mechanism that locks and unlocks the stem/fork. From the videos, it appears one pumps it then turns it. The pumping part seems quite easy but the turning part......just how much finger strength is needed? As an older person with small hands and not a lot of finger strength, I find myself "leaning" my leg onto the QR lever on my bike seats to lock them at the mast. If the tension on the Helix "lever" is similar, I doubt I could get sufficient leverage on that twisty piece. Interesting design option, wonder if it might be difficult for older folks who maybe have a touch of arthritis in their hands.