Hi: I am making a 3D caving helmet cake. I am planning on using a 10 inch round stacked under a 1/2 soccer ball pan and carving. I am looking for ideas on the best way to attach the light. I was thinking about making it gum tex/fondant, drying, inserting an LED light, covering with a gelatin sheet and inserting with a dowel. Would this hold, considering the size? I'll do the straps in fondant/gum tex.
Here's what the helmet looks like:

http://www.mendipcavinggroup.org.uk/graphics/vertex.jpg

Also, the cake has to be gluten free - will this make a difference in terms of structure? It's for about 20 people. I'll put another post for a good sturdy recipes for the cake.

I'd appreciate any suggestions! TIA

Try again... help please!