Trying to get an idea about how high I could stack 6' by 2' cages without being to high to deal with and looking weird. I would think having them stacked 6' would be easy to acess but look weird. Being 4' would be a good height I would think. And then, How do you heat the wooden cages? o you put the flexi under it and leave a small space so it doesn't over heat? Of course I will use a t-stat. Would need to be ok for boas.