There is a lot of adjustment built into the thing and you do have to mess with it. The other thing is making sure your cable housing is firmly secured. Slop on the aft end of the cable housing makes it so you can't get a good pull. Kind of like a derailer cable on a bike. My cable housing is just wired up there now and it's not as good as when it was securely bottomed out in the bracket that was made for it which I unwittingly plazed off.
