Originally Posted by JiveTurkey

Adjusting limit screws does not take trial-and-error.

Cable should frst be detached. Chain should be on the inner chainring and inner (largest) cog. Adjust L limit screw so that inner plate of FD gets as close to the forward-moving chain as possible without rubbing.

With shifter in either the inner or middle position (depending on which you want to use with the inner chainring), attach FD cable taught (make sure shifter is in the actual chainring position, not the trim position). Shift to outer chainring (may or may not want it in the trim poistion) and outer (smallest) cog. Adjust H limit screw so that outer plate of FD gets as close to the forward-moving chain as possible without rubbing.