noonespecial nailed this one. But allow me to suggest that others who would consider the route of patenting such a necessary invention that they should probably

noonespecial nailed this one. But allow me to suggest that others who would consider the route of patenting such a necessary invention that they should probably pick a reasonable licensing fee for their work. Why not license your invention for pennies on the copy/individual use? Competitors can compete on price, people can still afford it, and you can still obtain the benefits of your cunning.