Idk any, and that just so happens to be the two instruments that comprises my band right now. We have had many different other guitarists/singers walk in and out of the door but none of them have stuck around so far. With me on guitar and paul on bass = a badd combo for really coming up with anything. We are somewhat productive but have been much more with another guitarist to really be able to get in any groove. So is it true that we probably will need a full lineup or a drummer in order to see the magic happen?