Only one comment, soundwise about the whole thing, Burkels...
To be honest, I felt that the snare drum sound is a little 'flat', especially when pushed harder. Very little tonal dynamics, etc.. Perhaps if you layered it with one of the V-Drum (maybe the Pop or the R&B) snares that open up and rimshot at high velocities might help it snap out of the track a bit more... Just a thought, anyway. I know those seventies tracks did have a fairly dead snare drum, but not THAT dead!
BTW, seeing as how you put the MIDI file into the E80, added the Guitar Mode stuff and used Makeup Tools, you ought to have an SMF that COULD be played on anyone else's E80...