I am trying to cut 10' long sign for store window. I have broken the sign into small pieces to cut. But when it's cutting, the vinyl gets iff track---going crooked and messing up the long piece of vinyl. Is there a maximum length that can/should be cut so as to keep vinyl tracking straight? Is there a way to slow the speed down on a gx-24? Idk if that would help of not? Any ideas?