I've got a Sawgrass SG400 A4 printer and I want to print to some papers to sublimate to some Chromablast aluminium panels. The problem is, the panels are slightly longer (about an inch or so) than a standard A4 page (the width is fine, only 7 inches). I'm assuming that if I just buy some A3 sublimation paper (16.5 inches long) and cut it to the width of A4, I can then set up a custom page size and print to a 7x13" size?