Help with new Rack.

I'm building a new rack and it will hold 4 adult female sized tubs, 4 adult male tubs, and 8 hatchling tubs with females on bottom, males middle, and hatchlings top. I'm building it out of pvc and heat tape. What helix do you guys recommend? Also besides the helix what other supplies do you recommend? This is my first rack I'm currently using glass aquariums and they take up a lot of room.

Also if some of the tubs wont have snakes in them yet should I just set them up as if they had a snake in them and keep the heat tape running?

You'll get a lot of useful replies if you post this in the Caging Forum. Lot's of great ideas over there.

i built my rack out of melimine. its a great wood that has a good looking finish to it. i went ahead and set up all my tubs to be snake ready because you can never have to many balls :). remember to have a quarantine tub on hand. but pwilliams has a really good rack blueprint if you need it.