I use a center master dowel for any tiered cakes. I sharpen my dowels in a dedicated pencil sharpener and then hammer it through all tiers. I use simple cardboard rounds in each tier and a cake drum as the base cake board. I still dowel each tier to support the one on top of it, using either drinking straws or bubble tea straws.
Jenniffer White, Cup a Dee Cakes - http://cupadeecakes.blogspot.com
