its exactly like the DJTT mapping I just made the cue buttons flash to the master tempo on the down beat and the headphone keys above each deck fader flash to the down beat of that deck. I also made a cool mapping for a midi fighter classic that works well with the 400 and has flashing lights as well. It controls the play pause, master tempo selector, master deck selector, all types of syncing, wave form zoom, and deck flavor ( the thing that changes if the deck is micro, small, advance,... i think its called flavor). if you want it let me know cuz i have to make a few minor tweaks to it.