Brigid ...

Offer still stands or ... if you'd prefer ... you could e-mail with the MIDI you've preferred and I could at least check that the tune you and I are discussing is the same one!

A final tip ... of all of the posters to the mandolincafe tab archive, Karen Josephson seems to be the one who mixes melody and chords to a greater degree than anyone else whose inclination is towards Celtic or British Isles folk styles.

You can see an example of her tablature style by following this link (Jig - The Tenpenny Bit tabbed for mandolin by Karen Josephson