If possible I try to get the coral off of the plug and superglue the frag straight onto the rock. If the plug is too encrusted, then I clip off the long end of the plug and keep the coral on the plug disk, then glue the disk onto the rock. I use superglue gel. After a couple of uses it is hard to get that darn cap off of the glueVery nice Chuck. How do you attach the plugs to the rock? Super glue, epoxy putty?
I have always used a ‘bone cutter’… works great on plugs and corals.They are not easy to to clip off but I use a diagonal cutter hand tool. If that won't work I will start it off with a hack saw Some local stores will remove it for you if they have a table top band saw.