Ive read before where someone tied a rubberband around the coral until a line of flesh under the rubberband died off and the flesh along either side healed up. They then removed the rubberband and cut along the skeleton where the band was...
It would be interesting to see it cut on a tile saw. I'm a little leary of the rubberband method. I've heard good and bad things about doing it. Mostly based on band being to tight and killing part of the coral. I checked the coral and I don't see anything spectacular happening. It has a broken piece, but it's not doing much. Guess I'll give it a little more time.