Interesting article at MyGolfSpy site (or whatever it's called). Apparently there's a new trend that doesn't just pick the flex based on swing speed. They've found that the flex should be chosen by how it matches up with your swing. Like what the clubhead is doing at impact. Some lower speed swingers hit longer drives with shafts that were stiffer than what they might use based on swing speed and hit the ball longer with those shafts because they are making better contact on the face at impact. Makes sense to me. What say you?