Wow. That guitar blows my mind. So you can do all the variax stuff like shifting tuning and changing the sound of the guitar? That is wild, wow, what a mod. Was it difficult? Where did you get the parts?
I did it in 2005. It asked a lot of designs as I faced ground/buzz problems by merging the 2 signals...
I see the variax as an improved piezo. I mainly use it for acoustic/banjo/sitar stuff direct in the PA, separately from the DiMarzio+Kemper