I see the battery and the pots in your sketch but I don't see the pcb for the preamp?
Consider knob placement in terms of nearness to the strings, too. I tend to play with my hand open and pretty low on the bass. Controls that are too close to the strings kinda get in the way! Lining the knobs up towards the outside curve of the body and putting the battery (and preamp) on the inner side of the cavity will help keep the knobs further from the strings.
Consider knob placement in terms of nearness to the strings, too. I tend to play with my hand open and pretty low on the bass. Controls that are too close to the strings kinda get in the way! Lining the knobs up towards the outside curve of the body and putting the battery (and preamp) on the inner side of the cavity will help keep the knobs further from the strings.
from head to toe 