I also changed the strings on my Cirrus (see 55-02 post below). Used D'Addario XL nickels, and changing the strings lowered the action somewhat. But the Cirrus is awesome for low action, and I really have no problem except one - playing "C" on the E-string (8th fret) causes a buzz to happen - only place it occurs throughout the entire fretboard. I can't tell where the buzz is occuring, but I raised the saddle a little bit and that didn't seem to help much. Do I need to make an adjustment on the truss rod? That seems to be an extreme fix for a problem like this, but...? Any suggestions? BTW...I recently changed strings on all my basses (all new D'Addarios). Used XLs on the Cirrus, Chromes (flatwounds) on the 55-02, and half-rounds on the Millennium USA. First impressions? I absolutely LOVE the half-rounds! The XLs appear very good, and I think it's gonna be awhile until I get used to the flatwounds (my first set).