Ok...this is something I just learned. Maybe you old Reason heads already knew this but I thought I'd share it for those that don't. I always knew u could load up WAV,AIFF and Soundfonts audio formats in Redrum but yo can also load rex files by the slice...I think it's pretty cool to help change up your drum patterns using the exact same drums and percussions if u use a dr rex loop as your drum pattern. Cool for layer your drums as well.