I didn't do anything special, just looked at the FTM you posted and figured out some instruments based on it.
PPMCK has auto echo?
Building and rebuilding echos is one of the things I really wish I could automate in FamiTracker... maybe a special value in the arpeggio macro that reads back the pitch from a previous row or something.
Triplet based echo is fairly underused I think. it works pretty well even if the song hasn't got a triplet feel. Another way is throwing in fast arps instead of echo notes. (frame 3 in example)
edit: nice harmonies there, gyms. maybe add some melodic content.