I agree you did a good job. The version of Mingulay they do misses on both scanning and the words themselves. Plus, they insist on accompanying it.

My qvetch is as much about the people who are locked into "their" book as it is about what is the correct way of running a group. If it's a group, all of the participants should be audible, not just the "experts." To me acoustic means unamplified and unmodified. This group fails on several counts.
It does make me appreciate the sound man who works with us [the Sloop Singers] at the Hudson River Revival even more. The sound guy can make or break a group--but that's another thread.