I have a K&K twin spot in my Irish Bouzouki. It is a really good passive pick up but the main (and annoying) drawback is the lack of volume control on the instrument.
K&K now offers an add-on volume control for $60. Installation seems pretty straight forward but you do end up with a lot of "stuff" living in the instrument, it seems. Extra cabling, existing connector, added male and female connectors, volume control itself etc.
Has anyone done this? Your thoughts? Any other system out there?
Link to the K&K add-on
https://kksound.com/products/volumecontrol.php