I have a Sora front derailluer on my Bianchi. When I shift from the big chainring to the middle chainring it wont go, so I have to make it click all the way down to the small chainring and then click back over to the middle chainring. A riding buddy of mine said it sounded like my derailluer was too tight. I don't want to take it to the shop because they over charge and turn around is atleast 3 days. So how can I adjust it? Is it on the park tools website?