I'm hoping someone can help me out here. We have a new C'Dale tandem. Ultegra STI shifters. There's a lot of cable running back to the derraileurs! I've been futzing with adjustments and think I've got it mostly figured out. But the part that should be just about the simplest is giving me fits. I've tried turning the micro-adjuster built into the cable (just a few inches away from the levers) in both directions, then shifted back and forth, and I can't see any difference. Started out with just a few turns, then more and more, finally twisting it 20x or so in either direction just to see SOMETHING happen.
I'm not even sure which way runs the adjuster in and which way goes out. I was assuming standard right-handed threads so figured that twisting to the left would remove slack (?)