I just bought the Wilton 4-Tier Stacked Cupcake and Dessert Tower to use for my niece's 1st bday party. Any ideas on how to rig up the top to hold a small smash cake instead of more cupcakes? I saw a pic online of something that looked like a ribbon spool but no instructions or anything. If anyone has any experience with this stand I would appreciate any tips. Thanks! Melissa