+x Warren (Staff) - 4/6/2018 8:13:38 AMFor simple body panels, go with the single layer of 416gsm rather than 2 layers of 210gsm. The mechanical difference will not be significant in the application you are using it for but the cost savings will be highly beneficial. Rotating layers 45 degrees can be a good way of making a quasi-isotropic panel which means it will have improved torsional stiffness and hence twist less.