Hi everyone,just got my first alembic,she's a Eic 5 string,made in 95 i believe,i very pleased with it,just a few things maybe you could help me with,what is the small pot inside cavity on the the bass control for?are you supposed to touch this,or is it factory set,i can't see any setup/action info,it plays well,but if i change strings i might need to adjust the neck,what action can/should i expect,thanks,guys.