I bought an instructional video by Leslie West, "Big Phat Ass Guitar" a while back. At one point, he was playing organ on a guitar, I believe it was a Casio. I went on a quest to find a guitar like that & ended up with a Roland GR-33. That setup has so many contols on it, it makes a Les Paul Triumph or an RD Artist look like a Pignose amp!
Vox was very inovative in the sixties. A bass player I new, had a prototype Vox bass with tons of switches & nobs. I wish now that I had paid more attention to what it was capable of.