leather's so easy even I can do it
. go to a medical supply store, buy a cheap plastic handled scalpal.
then go to town on it. Try to slice, not saw, and try to get a piece of the base with each frag. You can get plugs from albert at gold's for like 55 cents each that are super easy to attach the frags to. only need fishing line, as no sewing into the coral with needles required. If they're too large for the frags, use liverock rubble or the likes. Just strap them directly to the rock, and they'll take hold. Even if they're a little sideways.
If you have any around long enough, cut off the fishing line once you notice it has taken hold, in order to prevent unnessary cutting from the line as it grows.