for my new BTB406 My last bass was a decent Washburn bantam 4 string. I liked it, served me well, but beyond tuning and changing the strings, I never really did anything else to adjust it - just played it. Any suggestions? How should the bridge/action be adjusted to ensure that the strings are tune across octaves (ie: open G, +1 octave, +2 octave - my Washburn went slightly flatter with each octave jump), etc? thanks!