Why we don’t have required plans the required hull shape. with almost every other sailboat class, the way it works is you buy a set of plans that the class sells, and. Pdr building faq . the overriding design rule is build it light. try to avoid the idea that. thicker/more is better/safer. where can i get plans for a pdr?. Welcome to absolutely free plans, in this section you will find free boat building plans including accessories and construction techniques. free plans have a tendency.