Just found this interesting video. There is no Bass drum in the normal spot but he has one where a gong normally is. Looks like he has an 18" floor tom in the usual spot and has a pedal hitting the bottom of it for the bass drum. Either that or the pedal is hitting an electronic drum pad going through speakers but how likely would that be in 1989? http://www.youtube.com/watch?v=V8AZIImBJXE