We're going to start off with the Cap and one of the Circles. Take your ruler and line it up along one of the width edges. Take a needle and mark .25 cm (.098 in) from the end (about 2 mm (.08 in) away from the edge) and then .5 cm (.197 in) until you reach the end. This should make the last needle point .25cm (.098 in) from the end. Now line up the ruler with both height edges and mark every .5 cm (.197 in) starting with the first and last marks along the width. Now take the Circle A and place it along the marked width of the Cap. Slowly role Circle A along the edge and mark Circle A every time it lines up with one of the needle marks on the Cap. Don't worry if the holes don't exactly line up but make sure you have the same amount on the circle and the width of the Cap. Take your nail and hammer through these marks.

We are going to repeat this process with the the Outer Tube and Circle B. Start off marking the width and heights of the Outer Tube just as we did with the Cap. Because the Outer Tube and the Cap are the same width, this means that both Circles will have the same amount of holes. So to make our lives easier take Circle A, place it on top of Circle B, and mark it using the holes we already created. Using your nail and hammer, puncture the marks on the Cap and Outer Tube.

We only want the Outer Tube and Circle B to be stitched together so when we stitch the Outer Tube and the Inner Tube together we want the Inner Tube offset higher. Place your Inner Tube flush with the bottom of the Outer Tube and then raise it .25 cm (.098 in) (you should be able to see the marks along the width of the Outer Tube). Now keeping this offset tightly wrap the two pieces together around the dowel. The height edges of the two tubes should now be flush. Using a needle mark the Inner Tube through the holes of the Outer Tube. This will ensure that the holes will line up when we stitch the two pieces together. Now finish marking the height edges of the Inner Tube every .5 cm (.197 in) until you reach the last point which should be .25 cm (.098 in) from the end. If you notice in the picture above, I forgot to do this last step before taking the photo.