I was at my LBS dropping my bike off for service. I told the guy that I had put the grouppo on a couple hundred miles ago and needed a tune up. My thinking is the cables have stretched out as they should. The tech said he would take a look and also suggested that I don't need the barrell adjusters on the front of the bike, coming from the hoods as in the picture below. Will taking these adjusters out of the picture give me better shifting?