I need advice on how to apply a fondant/gumpaste number 5 to the top of a half-sheet cake, please. I’m making a Disney Cars cake with the number designed like a street (black with yellow lines). I’ve only tried once before to apply fondant decs that are open like this once before; results were not pretty. My plan is to mix the (SatinIce Black) fondant with gumpaste 50/50, cut to shape and dry for a couple of days before sliding perfectly into position using a flexible cutting mat. (Ha.) Alternatively I can mix tylose into the fondant, though I’ve never done this before so don’t know proportions. Thanks for any help!