So this weekend I'll be making a 4 tiered square buttercream cake that has tapered tiers. The tier sizes are 12,10,8, 6. The 12 will be tapered to a 10, the 10 will be tapered to an 8, the 8 will be tapered to a 6 and the 6 will be tapered to a 4. My question lies in the best support system. Since the tiers are offset, can I use SPS? It seems like the legs might be too close to the edge of the cake and I don't want to displace too much cake and cause it to blow out, crack or anything of that nature. Here is a picture of the cake the bride wants and it will basically be the same but with Daisey's instead of Calla Lillies. Any help is appreciated!

http://cakecentral.com/gallery/1385897/black-and-white-polka-dot-trapezoid

Thanks!!

If you use SPS, and completely offset diagonally (the photo shows twisted -- almost offset), the internal pillars wouldn't pierce through the tapered bottoms of each lower tier. I don't think you can get a 4" SPS plate, but if you could...

the 4" plate's pillars would be 1 1/2" away from the 6" base tier below,
the 6" plate's pillars would be 1 1/4" away from the 8" base tier below, and
the 8" plate's pillars would be 3/4" away from the 10" base tier below.

I don't think you can get a 4" SPS either, so I was just going to use bubble straws for that one. But I was concerned about the other 2 larger layers. Thank you for your response though! This cake has been keeping me up at night all week!