I lowered the action on my guitar (ax7221) and then set the intonation (I had to bring the saddles back a lot! Factory spec must have set it to ****). Anyways, now the the intonation is set, and when I test it on the 12th fret (harmonic and then fretted note) I get a buzz when I press the string down. I wanted to set the action a little lower but obviously the buzz shouldn't be there. Any ideas on how I can get rid of it so I can proceed the setup on my guitar?