so im deffinitly getting either the kaos or the pro model but i just have one more question. on the site it mentions you can reduce the flex of the boots by unscrewing the rivets. Does this really make a difference on the pro model or kaos and has anyone tried it? also, im a aggressive skier and im 6ft and 140 lbs, is the 110 flex on the pro model too stiff for me? thanks so much and i promise i wont make anymore threads!