OK folk, I am thinking to get the CD/DVD printer, Epson R200 $99 at Staple, I have some questions about the DVD-R printable. 1. What is stack ring ? 2. The Epson R200 can print on: silver printable or white printable [bold]NOT[/bold] on white thermal printable ? 3. What do I gain or loose if I used Stack ring or Non Stack ring DVD ? Thanks you folk.