try this drum primer....
save anything you want and initialise the 7k.
select 16bt standard in the first rhythm group.
press and hold one touch play.
press menu, composer, pattern copy, then OK in the screen.
press exit.
press composer A on left of screen.
press OK in the screen.
press DR1 at the bottom, the pattern should start to play.
press Drum Kits in the Sound Group, it should be live standard kit.
change to standard kit 1 on the right and listen to the difference.
try standard kit 2 underneath.
try pop kit on page 2.
then analogue kit 2.
then try soul kit on page 3.
etc etc
just by changing one set of drums.