Just curious, for reasons historic or otherwise, why is the Pure Drive available in a heavier spec (PDR) yet the Aero Pro Drive is not ?? Is it only the Roddick factor ? Surely there are enough APD-using pros who are seen to play with obviously leaded-up APDs that Babolat could see some potential to add another heavier frame to their line-up to create a niche for a heftier retail APD ??