In this video of the videoHow to Build a Surfboard, I go over shaping the rails and start marking out the guidelines (railbands) for the rails.\r
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There are two angles filmed, one from my head and the other from a fixed camera. \r
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For a reference on how to mark the rail bands:\r
Scroll down to the section How to Shape Surfboard Rails. There will be a link to a PDF with boxy and knifey rail bands. \r
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Here is the playlist for the video :\r