Hello everyone, i am making a small brief case with oak which is 470mm x 210mm x 70mm.I have 30mm thick oak boards and would like to make the lid and the base about 6-8 mm give or take would i be able to rip these boards or will i have to plane them down to thickness.I would prefer to rip them as it will be less waste but iam worried if i rip them the might warp too much???