My Enclosure

[TRD]

hello..

Does it matter if the dimensions for the pvc tank are a little off?
Nope

Would that mean the snake can still get out?
Nope, unless you leave the door open or they don't close well enough

And would I still need a uth and heating light?
Yup, just don't make the plastic melt, and you need a thermostat. Probably just a light would do, but snake shouldn't be able to touch it.