hi Mica you're so kind,i'm sure that the bass was set up proprely,the bass is fantastic,i'm sure also that the problem is the drastic chabge in temperature from hot california to cold germany and cold italy.i have changed the string with dr string with the same gauge,becouse the D string was broken on the peghead the first time i have tried to tune it,probably on the E side i got to much space on the first fret but i do it for try not to make it buzz,then i have loosen the truss rod 1/8 of a turn anticlock turn(for loose is correct?)and the bass was pretty better but not enough,and then i have raised the bridge on the E ide a bit,if i press at 24TH fret And press at the 1st fret i can see a bow,on the first fret to the 7th fret i got no space from string to fret,and the same on the last fret on middle the space is ok,as i said i see a bow.got no probem playng on the end of the fingerboard,the problem is on the E and A string also playng it free,it slap over the frets dang dang.Help me....i'm sad,i want to play this beauty!thank you!