I have a Shimano Ultegra 6510 front derailleur that when I shift to the large chainring and smallest gear on the rear( high gear) set the trim all the way out I'm fine. My problem is when I down shift and want to trim back a little I always end up going all the way to the small chainring rather than staying on the large ring with no chain rub. Now, I that know that mechanically everything is fine because a friend and the Mechanic at my local shop can both make it work. For some reason I can't feel the click and always go past. So, is there anything I can adjust to make this not so sensitive or maybe switching to the dura-ace control lever would do the trick or Campy. I'm open to any ideas. Thanks Jim