Hi Jesper -

Another measurement that is very critical to a successful building project is the correct "rocker" set up on your forms. Rocker refers to how much the bow and stern, along the keel, will curve upward. Rocker has a profound effect on tracking and manueverability. That is a measurement I check while I'm building, too, in case the strips start to pull the overall shape out of alignment. Rocker will be determined by how you set up the forms. A half inch on those dimensions is huge. So, set up the forms in proper alignment, then check the rocker measurement for each form. It will be a measurement from the keel tip of the form to a line or string run across the top of the keel. The rocker number for each form should be in those offsets.

: Jesper