Can anyone share instructions on making a 3D jukebox cake? I thought it was pretty simple (cake, filling, dowels and so on building upwards). However, I made a diaper bag cake this past weekend and I did just that but it collapsed during transit so now I am SCARED!!! Is there something I missed? I did cake, filling, cake, three dowels straight across, cardboard, (dab of icing under and on top of the cardboard), cake, filling, cake and a dowel straight down the middle of the entire cake. But it fell backwards.

Now I am wondering how many tiers of cake and filling will it take for a 3D jukebox cake and what is the best way to structure this cake so that this doesn't happen to me again!

PLEASE HELP!!!

TIA
Cari