Thanks everyone….I am going to start cutting and stacking tonight. Looks like best way to do it would be to cut sheet cake into 4 parts. So I’m thinking 12×5 stack those 3 up and then use the last 12×3 inches to build up the front. My original thought was to do 3 stacks, but not sure that will give me the height that it needs. Guess I’ll try to think a little more about it in the next 3 hours before I start cutting.