actually mrdave they do, the fill changes with which variation you play..My pa1xpro did. As I said some of the differences were slight, but they were different..the fill when playing vaiation 4 was different to the fill on variation 1, as was the fill on variation 1..mind you SOME of the styles did have pretty much the same fill, but they were some of the more sparse styles anyway..My only gripe was that the fills were usually too loud to suit either the previous variation or the next one. I have heard this is something that has been fixed with 3.0 Op Sys and on the PA2Xpro