Fragging a bubble coral. Bad idea?

Who here has fragged a bubble coral and lived to tell about it? Sharp band saw? What about multiple mouths? How did you keep from damaging the polyps?
 
Well, fragging some of the more complex LPS seems impossible? Anyone out there a master propagation artist, or should I just give up and buy some new corals?
 
When Robert did his fragging demo at one of the club meetings last year, I asked him about fragging bubble coral. He said didnt have a very optimistic outlook on it, even if using a wet band saw.
 
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