You use 3 layers so I am going to say 6 in high. I have a great tutorial if you want it pm me.
Adatay just put together a tutorial you might want to check out. Here's the link:
check out this thread:
and there is always the tutorial in the articles section here as well.
HTH!
I thought I'd add these too:
Sarsi's instruction sheet:
http://cakecentral.com/cake-decorating-ftopict-587795.html
and here's the one from the article section by BKeith
http://cakecentral.com/article1-Instructions-For-Building-A-Whimsical-Tilted-Cake.html
I don't think there is a certain height for a topsy turvy cake. I've seen tall one that looked nice and I 've seen shorter ones that looked awesome. It depends on the design you are aiming for.
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