Polybass octaves each string separately, thats why it works so accurately.
so get a pickup for each string. there are several options on the market and we also offer two versions
then we need to decide about the controls, outputs and battery location
in many cases we can reuse previsous installations or existing holes for potentiometers, sliders
if you do not want to drill into a virgin guitar, use Fingerwheels, batterybag and strap jack
for details get this manual