Jim,
You'll also need something to keep the hull from spinning while crimping.But we don't need no stinking expensive hull vise!
Make your own, two small blocks of wood, 1 small brass hinge and screws,drill one oversize hole,line hole with a piece of rubber automotive heater hose for grip on the hull. Looks like this.
Roll on brother! ;>)

The clearest way into the universe is through a forest wilderness.
-John Muir