Looks nice hammerhead.
Can't really tell what method you used there. But it looks like it might be similar to a way that I use to make extended bodies:
tie in a length of heavy mono to the hook shank - leaving a tail hang out over the hook bend. Then tie in some tail materiel that sticks out even further along the mono. Then dub a tapered body out to the end of the mono and back. You can even rib it if you'd like
Makes a nice looking and flexible extended body.