this is what I do I take a needle and pull the living rubber away through and cut off the excess take A JIG and put it on in superglue the end of the plastic BAIT to the head you can do the same thing with marabou. question will the living rubber lay in the cavity so you can shoot the whole length.
www.bobsjigs.com
Bob if Ipush up on the living rubber into the mold I believe it will completely engulf the livving rubber and not need super glue. Will have to give it a go. still need to place vent system in shop over work station. just wanted to give the molds a shot. Also heated the tail mold with a hair dryer on hi worked very well. Dave