I had a job for several years (5, actually), where I played a Carvin double with guitar and bass necks. I had a bass drum, high hat and bass pedals. I played drums and bass with my partner, a guitar "picker and grinner". When it came time to solo on guitar, I switched to bass pedals. Luckily, he was a great entertainer, but not much of a musician, so the changes were pretty simple. Tried to switrch to an early Auto Orchestra, but his timing was so bad, he got really fowled up.
Fun days (I think...I was still "young and wild")!
Russ