Hi cris . You might want to think of using crab pot floaters. I've used some that I find on the shore line washed up after a storm etc. I cut them in half long ways and glue or screrw 1/4" plywood with a thin strip of lead the size of a pop cicle stick as keal.I make the heads from 2" styrafoam board {blue board} attached head to body by drilling and using a 1/4 "wood dowl down thru the top of the head with gorrila glue. the bottom ply board gives me somthing to screw my eye screw to for my long line.I've made 5 blue bills so far and they worked good ,but so far I only was able to draw in buffel heads.