The Device was created by Raymond Pratt. Ray is a frequent poster on the Airgun Yellow forum. He approached me many months ago, asking if I would like to have a go with this thing. My obsession with accuracy guaranteed that I would say "yes". And now, having tested and used this device, my next goal will be to convince Ray to sell it to me. :) Obviously, more tests are needed, but I am convinced that sorting pellets by their head size has enough potential that I am ready to put my money where my mouth is. I have NO IDEA if Ray intends to offer these or sale. If he ever does, I will add a link to this description.