I recently put on a new set of STI shifter/brake levers (Dura Ace 9- Double). I'm generally very happy with them; very smooth. The right lever works great. The left lever brakes fine and upshifts from small chainring to large just fine. However, downshifting from large chainring to smaller feels stiff, hard. Anyone know if there's an internal adjustment for this, or some way to get it so it's not so stiff? Thanks!!