Harmonica tablature for Musescore 2

Greetings, and many thanks to the developers and contributors for this project.
Since I found no reference to anyone porting Harmonica Tabs to version 2 of Musescore I decided to have a try at it myself. Beginning with the NameNotes plugin I was able to come up with this.

//
// Harmonica Tabs Plugin
//
// Copyright (C) 2015 Ross Melin
// Based on Note Names Plugin
// Copyright (C) 2012 Werner Schweer
// Copyright (C) 2013, 2014 Joachim Schmitz
// Copyright (C) 2014 Jörn Eichler
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2
// as published by the Free Software Foundation and appearing in
// the file LICENCE.GPL
//=============================================================================

import QtQuick 2.0
import MuseScore 1.0

MuseScore {
version: "2.0"
description: "Harmonica Tab plugin"
menuPath: "Plugins.Harmonica.Diatonic.Richter.C"

function tabNotes (notes, text) {
for (var i = 0; i < notes.length; i++) {
var sep = "\n"; // change to "," if you want them horizontally

var harpkey = 60 // C4 (MIDI pitch value)
var richter = ["+1", "-1b", "-1", "+1o", "+2", "-2bb", "-2b", "-2", "-3bbb", "-3bb", "-3b", "-3",
"+4", "-4b", "-4", "+4o", "+5", "-5", "+5o", "+6", "-6b", "-6", "+6o", "-7",
"+7", "-7o", "-8", "+8b", "+8", "-9", "+9b", "+9", "-9o", "-10", "+10bb", "+10b",
"+10" ]; //Standard Richter tuning with overbends

var tuning = richter

if ( i > 0 )
text.text = sep + text.text;

if (typeof notes[i].pitch === "undefined") // just in case
return
if (typeof tuning[notes[i].pitch - harpkey] === "undefined")
text.text = "X";
else
text.text = tuning[notes[i].pitch - harpkey] + text.text;

} // end for note
}

onRun: {
if (typeof curScore === 'undefined')
Qt.quit();
var cursor = curScore.newCursor();
var startStaff;
var endStaff;
var endTick;
var fullScore = false;
cursor.rewind(1);
if (!cursor.segment) { // no selection
fullScore = true;
startStaff = 0; // start with 1st staff
endStaff = curScore.nstaves - 1; // and end with last
} else {
startStaff = cursor.staffIdx;
cursor.rewind(2);
if (cursor.tick == 0) {
// this happens when the selection includes
// the last measure of the score.
// rewind(2) goes behind the last segment (where
// there's none) and sets tick=0
endTick = curScore.lastSegment.tick + 1;
} else {
endTick = cursor.tick;
}
endStaff = cursor.staffIdx;
}
console.log(startStaff + " - " + endStaff + " - " + endTick)

for (var staff = startStaff; staff <= endStaff; staff++) {
for (var voice = 0; voice < 4; voice++) {
cursor.rewind(1); // beginning of selection
cursor.voice = voice;
cursor.staffIdx = staff;

if (fullScore) // no selection
cursor.rewind(0); // beginning of score

while (cursor.segment && (fullScore || cursor.tick < endTick)) {
if (cursor.element && cursor.element.type == Element.CHORD) {
var text = newElement(Element.STAFF_TEXT);

var graceChords = cursor.element.graceNotes;
for (var i = 0; i < graceChords.length; i++) {
// iterate through all grace chords
var notes = graceChords[i].notes;
tabNotes(notes, text);
// there seems to be no way of knowing the exact horizontal pos.
// of a grace note, so we have to guess:
text.pos.x = -2.5 * (graceChords.length - i);
switch (voice) {
case 0: text.pos.y = -1; break;
case 1: text.pos.y = 10; break;
case 2: text.pos.y = -2; break;
case 3: text.pos.y = 12; break;
}

cursor.add(text);
// new text for next element
text = newElement(Element.STAFF_TEXT);
}

var notes = cursor.element.notes;
tabNotes(notes, text);

switch (voice) {
case 0: text.pos.y = -1; break;
case 1: text.pos.y = 10; break;
case 2: text.pos.y = -2; break;
case 3: text.pos.y = 12; break;
}
if ((voice == 0) && (notes[0].pitch > 83))
text.pos.x = 1;
cursor.add(text);
} // end if CHORD
cursor.next();
} // end while segment
} // end for voice
} // end for staff
Qt.quit();
} // end onRun
}

Like the Harmonica tab plugin for 1.3 it could be edited to create separate plugins for different harmonica keys and tunings. I would like to have one plugin with a GUI dialog to select between keys and tuning schemes. This is a little beyond my coding skills at present. I would like to inquire if anyone has interest in assisting with this.
Sincerely,
Ross Melin