How do I position the center fin box from the tail? How many inches from the tail to the center of the box? Here's the centerfin position info: https://cdn.shopify.com/s/files/1/0689/1441/files/Surfboard-fin-position-layout-guide-tri-quad-2-plus-1-longboard_b6079546-0668-4c56-8368-77739d9c0904.pdf?16216708058669744041
