lots of good advice on here.
some of my snakes(draecenas), curl inward and from what i have learned it is underwatering. then maybe water when the pot is half way down the size if it to re-water.
i would stop using peat moss as it holds water. maybe add a few stones to aid in drainage. great advice on the terra cotta. and perlite also. i have a snake that is about 8 years old and going strong. great plants.
jay