I've looked at the bikini cakes on here and I have to do one for a customer this weekend. I will be using the 11x15 pan as well as the sports ball pan for the boobs. I'm wondering the following?
1.) Should I put each "boob" on its own board with down supports underneath it or is the 1/2 sports ball pan light enough that it won't affect the bottom layer?
2.) If I don't need to put them each on their own board with supports underneath should I still use dowel rods through each to hold them in place?
3.) Any ideas on what to use for the nipples? I'm using buttercream and MMF. This is the least of my concerns but I thought as long as I was asking I would ask this.
I didn't use boards on my torso cake, and didn't have problems. It was the same sizes you are using. I used fondant for the nipples.
I used the same pans for my torso cake that you will be using for your's and I didn't use any boards or dowels. I had no problems with the cake at all. I used all buttercream for my cake including the nipples but fondant will work too. HTH! Good Luck.