I have tried several times to do large stand up numbers on top of a cake with mixed results... I've tried cookies but those broke, the last few times I tried rolled gumpaste, cut out, but the surface is always wrinkly, and I still have trouble with them breaking when I handle to insert into the cake. Last night I made gumpaste numbers with skewers for a cake for this weekend... again with the wrinkles. My idea is to use them but attach a MMF cut out the same shape to the front. Do you think this will work? What should I use to "glue" the MMF to the gumpaste?