I took my JtS in to my LBS today to have the drivetrain tuned since it wasn't shifting properly and was making a lot of noise after about 110 km's. While I was there, I mentioned that the front trim on my 105 isn't working, and there was a bit of chait rub. He said confidently that he would only need 15 min to work on it... so I walked away feeling pretty good about the whole thing.
After 15 min, he said the noise was from the misaligned derailleur arm, and he adjusted it without problems. The jockey gears in the rear derailleur was still making a lot of noise, and he couldn't do anything about it. Since I know very little about bikes other than to hop on it, I took his word for it. He started telling me about the front trim and how he couldn't get it to work, and he thought it was because of the offset at the front crank or something. He couldn't figure it out. He said it's fine as it is and sent me on my way. After hearing that, I was a little mad, but I didn't show it since I would have to come back for more tune up in the future. The fact is that when I test rode my bike before I purchased it, the trim was working fine!!! It certainly could be adjusted on my bike cuz it was there before! I am wondering if he worked on it... or just decided to send me on my way instead.
I am starting to think that some LBS are like bad car mechanics... I am sure there are nice bike techs out there, but these ones give rest a bad name.