Instructables

Step 4: Better Scaling Method

Scaling could be done much better if an overhead projector or regular projector can be obtained. With a regular projector, you can just project the plans and zoom in until the projected pieces are of the proper size. With an overhead projector, you can place the cut out pieces on the projector, and move the projector around until the shadow is of the proper dimensions, then trace and cut out as detailed previously.