I guess the main problem with the Crazy8 - in this context - is that it only outputs tracks 1-4 through the first MIDI output, and tracks 5-8 from MIDI output 2. So in order to sequence all 8 tracks of the DRM at once, you'd need some kind of a MIDI merge box in between...
Besides that - or if you're content with just four tracks - it shouldn't be too hard besides the initial MIDI track setup on the DRM's side. Not much to setup on the Crazy8 besides selecting MIDI channels.