Ice 2-layer cakes smooth.
Use Cake Dividing Set to divide cakes: divide 8 in. cake into 16ths, 12 in. cake into 24ths (divide into 12ths then divide in half again), 16 in. cake into 32nds (divide into 16ths then divide in half again).
Pipe alternating tip 126 and tip 103 ruffles along division marks, holding wide end of tip against cake so that ruffles stand up.
Pipe tip 2D star bottom borders on all tiers.