Wow. I'm gobsmacked. You are actually doing it right. Color me impressed and that is not easy.
My only suggestion since you are getting a baby is to get a small tub with a lid initially and set the baby up in that. Put the tub inside the T3 so 1/3 of it is over the heat tape, as a baby could easily get overwhelmed in the T3. Once the baby grows up a bit you can transition it.