Hello, not sure if this is the right place to put this, but I am trying to lower the action on my 'Chord CCB90'. I understand how and am able to adjust the action at the end with the body, but the fretboard has some bowing, which has caused an uncomfortably high action (and has since I got it but have only noticed now). I believe it can be sorted by doing something with the headstock and truss rod.
My main questions are:
Is there a special tool I need to turn it? Which way do I turn it? and is this specific bass's truss rod able to be changed? as it is quite a cheap one.
any insight helps, thanks
In wiltshire, england as @Dad3353 said to add