I just completed a build of a gorgeous Cannondale Six13 with an ultegra/dura-ace mixish. This was my first time with a nice road bike let alone putting one together myself, and I think I did a pretty decent job. My only problem is with installing the shifter cables, which I assume is the hardest part. I calibrated the rear derailleur correctly (or so i thought), but for some reason the chain from the chainring to the cassette isn't straight and everytime i turn the pedal the chain rubs on the chainring. I'm guessing it has something to do with small adjustments, front or rear derailleur, any advice would help greatly as i have no idea. I also watched those videos on bicycletutor and they didn't help much... thank you!