For installation of the template, be sure to take the board twice as long as the so -called «PART». With a short run, the template will be unstable when stretching. Pay the profile board with nails to the lane. The angle of the template and the panel should be 90 degrees. The template is strengthened on the workbench, pressed the way to the rail, which directs. Plan to make a model with a thickness of four centimeters? To reduce its weight, you need to make thrust from gypsum with voids. For example, use clay gasket (up to 10 centimeters) or wood (more than 10 centimeters). Gypsum will easily separate from such a laying if it is covered with a thin layer of paper. The detail that you stretch should not be longer than a meter: you can curve the product.