Jeremy,
I'll do my best to answer this. Jake is probably the best person to contact. email him at [email protected]
I would use a rubber band. That to me is the best way. Well second best, if you can let the coral grow onto another rock first, then split it that is the best. But if cutting the coral, try placing the cutting into a hole or crevase in the rock, then holding it on by putting two rubber bands in an "X" pattern over the coral. It should grow and attach in about 3 weeks.
Steve Lopez has a method where he ties the coral on with fishing line and a needle. This is common. But what Steve does is he puts a small rubber band on the two ends of the fishing line. Then he can pull the coral down tight over the rock by stretching the rubber bands to nearby rocks. Make sence?
just my thoughts,
Adam