He never addressed the adjustment of the brakesor taking into account the possibility of shifter cable-stretch. Shifting can be improved by zeroing the front and rear derailleur,(taking the tension off of the spring)and taking up the excess cable slack, either by unscrewing the adjustment barrel,(tightening the cable),or by actually loosening the derailleur cable bolt and taking up the slack with needle nose pliers, then tightening. Don't forget to set the limit screws for high and low.