Ok Ive played quite a few mandolins with virzi's in them and im hearing a consistent characteristic that Im really enjoying. The question is how does one virzi an instrument thats already built. Is there another technoligical breakthrough that any luthiers have discovered that has a somewhat virzi effect on an instrument? And without taking apart. Ive heard some things people have tried that they claim worked, but Im waiting to see if anyone else on here mentions it before I post it and sound like a absolute dork. hahaha. Also does anyone know if a virzi has ever been installed inside of a acoustic guitar?