The ornaments in Lew Rozelle's book are assembled from basic units of his design which he calls Bases, Hinges, Clips, Inserts, Joiners, and Convex Joiners. The Cross Ball ornament calls for 6 Bases, 8 Convex Joiners, and 6 Inserts. The Inserts are decorative, not structural, so they may be omitted, depending on the type of paper used and the folder's personal tastes.

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