Just a question: Hasn't anyone come up with a lower cost grey projection screen? It seems that lots of people have used Dulux icestorm to give better blacks and higher contrast, but what about those of us who use screens and cant afford Stewart prices?? Cant be THAT hard for screen manufacturers to duplicate the colour can it? Or isn't it that simple? Pardon my ignorance if everybody else knows about such a screen, but all the ones I've seen cost more than my pj! PS do these grey sceens actually work?