I carve that as 2 separate tiers and flip one and then clean them up.
So, for example, you have 2 8" round tiers (4" high). Then I get one circle that is 6" or 7" (depending on how dramatic you want the cinch to be) and put it top in the center. Cut that cake at it's angle. Then do it again. Using a circle on top will make sure they match up. Dowel the bottom one, flip the other with your guide board between them and stack. Clean up as you need to. crumb coat and fondant.
Thats an Awesome cake! Mine would fall over...lol
I know you dowel them but what says the top one wont keel over when you move it?...especially with the cinched part....Im in awe!!!
IF you have pans in two sizes such as an 8" and 7" you can bake one layer of each put together as one tier. Make up two tiers (one 2" layer of 7" round and one 2" layer of 8" round each); place the two smaller parts of the tiers together once iced.
OR you can use a cake board to cut down one of 2 like-sized rounds:
bake two 8"x2" rounds. Using a cake board or other pattern cut one of them down. Place the pattern centered on the cake and cut at an angle from the 7" pattern on top to the 8" bottom.
If you want more of a sever(sp?) hour glass look bake one layer each of say 10"x2" and 8"x2", cutting the 10" down using the 8" pan as your guide.