After follow http://www.fender.com/support/articles/bass-guitar-setup-guide, to my 1977 Fender P-Bass with new strings (standard bridge and all), I checked that: 1. Intonation (Bridge saddles setup) is OK. 2. The (trust-rod setting is OK)..gap between the bottom of the string and the top of the 8th fret (with capo at the first fret and depress the fourth string at the last fret) is already OK (.014"). But: Action: the distance between bottom of strings and top of the 17th fret still are too high (more than recommended/standard 2.8mm at bass side and 2.4mm at treble side). Especially at the E and G strings. I already adjusted the bridge saddles to their lower possible position. But the distances are still too much (too high the strings actions). What's the problem? What should I do to make them lower, as low as what Fender Setup Guide recommended?