[Re: advice from Nathan Brindle, John Lyon, and Douglas Winship about
setting Send=Editor,Hold, then freeing the list]

Thank you all for your advice.  I've implemented it and it I haven't seen
any duplicated messages coming through the approval pipeline.  Much less
painful that I'd expected, and it did not require LISTSERV admin
permissions (I'm just a listowner).

Much appreciated,

Michael