There is too much friction between the metal to allow the wheel moving back in the dropouts as you tighten - you still apply the tension yourself. (From what i understand)The wedges stop the wheel from moving forward, as the nut on the thread prevets the dropouts from widening the fraction of a milimeter that they need to in order to move forward.The chain stops the wheel from moving back due to its finite length. Of course you'll have to tighten again due to chain stretch, but thats the same with any solution.This solution basically just stops the wheel from moving forward, thus keeping the distance you set the wheel - eliminating the use of tensioners. You just have to set the tension yourself by pulling back on the wheel as you do it up.From what I understand, anyway.
Final weight of the frame is 2,33 kg (5,15 lbs) . This probably makes it the heaviest modern flatland frame I'm sure that there will be haters that will have a lot to say about this issue
Thank You,everything about that frame is the sh*t been waiting for 2yrs for this, come on Pat at FF