I've never intentionally fragged mine....and I currently have 6-7 baby sarcophytons on the sand bed. Mine drops little young 'uns off now and then all on its own.I've had it for well over 3 years now and I bet I've traded off 6 or more frags already....and I have several that are ready to go soon.
I seldom "frag" any of my corals....some are very easy...like my frogspawn....just remove a branch....others like my zooanthids I just place a piece of rubble near them and wait for them to spread. Myself....I'd be cautious about cutting and attempting to secure any coral.....for me I much rather wait and allow them to spread/propagate....on their own. :thinking: