Okay, maybe this is just me, but personally but i do not like stacking systems. What kind of life is your snake having in a small box. I mean sure they are warm but they no room to do anything.. and this doesnt just go for snakes, this goes for geckos and beardies as well. If you want to breed then okay, thats fine. But having full growns in there in my personal opinion, isnt okay. If you want a lot of snakes then colonize in a big tank. Like i said, maybe this is just me but i wanted to see what everyone elses opinions were.