Donny, have you ever used them? The markers, from the little testing I did with this system, sometimes has a glitch effect, like the song skips a beat or hesitates when triggering back to the marker. This may have something to do with the keyboard's processor speed, though - not sure.

The best use I found for midi files was for learning a song that I didn't know. They were a good tool for that purpose. Same goes for MP3s. The only mid files I used when I was still working were some that you gave me, very long ones that I could put on before the show started, or during short breaks on long jobs.

Gary