Hey everyone!! just built my first rack system havnt moved my snakes to it yet still have some questions im useing 32QT tubs for 07 babies i have 2 but i built the rack perfect to my plan theres a back to it tho i see some racks with no backs and no side walls myne has side walls and a back wall 5/8 MDF just wondering thats ok? and they are a pretty tight fit i might need to put some air holes in the side of the tubs but i just want to make sure this sounds ok i dont want to cook my babies i havent put in the heating system yet funds alittle low right now