Since I'm building two at the same time you'll notice two of each component, except the wing ribs which are two stacks of fifteen each. Actually only fourteen ribs are needed for the build but, I throw an extra piece of balsa in the stack and have an extra just incase I break a rib during the building process from being clumsy. I lay the templates that were created by tracing over the carbon paper and cutting out the card stock onto the balsa or plywood as needed and trace around the outside of the pattern on to the wood with a pencil.