Chris's way of using ABC to record editiorial decisions is a very good idea (most other notation systems can't do that as easily). I do the same.

But it doesn't address the issue of WHAT editorial decisions you make, confronted with some piece of garble knocked off by an apprentice engraver with a hangover. Usually you can find other copies of the tune that make more sense (though one of Aird's defeated me: he seems to be the only source for it, it's nonsense as it stands, and there's no obvious fix).

Dance code is another problem. I've never had access to a dance expert who could make sense of David Young's instructions - nobody's ever contacted me about making practical use of them. Since I don't even do modern dances of similar type, they could be Masonic rituals or instructions for preparing the Philosopher's Stone for all I know. And it looks like Chris P is editing in a similar vacuum.