I was working on this answer. The only sin I can imagine that I was committing was saving too frequently the work in progress in case I am dragged away from my desk by a more serious fire that needs putting out, unable to return until who knows when. I was literally in between updates when it was deleted out from under me.

Michael Hampton please advise. You left no comment and there is no commenting on deleted posts.

Also somebody please undelete this answer if you want the results of my investigation.