I think Conklin made one of the coolest Bass-Guitar double neck setups I've ever seen. I like the fact that you can have functioning seperate instruments or the double neck. Of course it is late 80's, pointy, rare, etc, but it's still a nice idea. Conklin makes innovative instruments to this day. Check them out here:
![Image](http://www.vintaxe.com/forum_pics/1987conklin_double.jpg)