Building It

  1. Thoroughly wash the can, then use a can opener to remove the top, leaving the rolled aluminum ring intact (Figure 19-3). Depending on your can opener, the top may come off more easily if you turn the can opener’s crank backward.

    Tools and supplies

    Figure 19-2. Tools and supplies

    Removing the top

    Figure 19-3. Removing the top

  2. Measure 2 1/2″ down from the can’s shoulder (Figure 19-4), marking this length at several points around the can’s circumference.

    Marking the flyer; the “top” of the can is to the left

    Figure 19-4. Marking the ...

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