Ok so I was always told do not transport tiered cakes assembled. But I need to do a topsy turvy cake and I do not see how I can transport with out it being assembled. Please know that this is my first topsy turvy cake and delivery.
My tip would be to put the topsy turvy on a heavy or an oversized base. Those guys are very tippy. I used a tile for one of mine and it worked great. Also, if you can put the cake into a box that fits the base perfectly that helps as well.
Make sure that you use the center dowel or sps as well. I always transport my cakes fully stacked.