Shape-note shapes

I love the shape-note plugin, although I often feel as if I'm about 70% of the way to being able to write sacred-harp music using it (mostly because of problems with "repeat" notation). But my big complaint is the "diamond" note head, which appears too small (especially in the "hollow; half-note form, where it's difficult to distinguish it from a "filled" quarter note, especially if the note lies on a line rather than a space).

So my question is: is it possible to edit the font somehow, at least for my own use, to make those diamond note-heads a bit larger? If my enlarging the note-head means that the layout-of-notes-in-a-measure algorithm gets a tiny bit messed up and squeezes other notes too close to this one, that's totally fine. Having more than one "diamond" in a run of notes is so rare that this is unlikely to ever cause me a problem. :)

BTW, I've also copied the plugin and made a new version that's suitable for 4-shapes-only (since that's all I use), which has the advantage that it needs no UI, and can be given a simple shortcut, so that after every edit I just press ctrl-shift-Z and don't have to click twice to make the update happen. I'm not certain whether I should share this, and if so, HOW I should share it. (I could, of course, at the same time make a 7-note-only version, for folks who want to write that kind of music.)

--John