My feeling is that Ginny's  position has merit. There are obvious ethical
implications (so what else is new?) if we engage in presenting the same
paper simply as a subterfuge for legitimate effort. As long as we are not
presenting to the same audience, and as long as the presentation
represents an evolutionary development process, I see no harm.
 
Very timely topic. Thanks!
 
Bob Lamb  deep in the heart of Texas.