I think thats about right, off the top of my head. I have been working with some at school for several months now, and they seem pretty simple. One thing though, i personally would avoid using sand as a substrate. It can dry out their toes and cause bad sheds, and potentially the loss of toes. We have one of ours on i think reptisoil. What ever it is, its a dark really fine mulch type stuff. I like it because it really makes the leo's bright colors SHINE. Its a tiny bit harder to spot clean than sand, but also doesnt look nearly as bad when they leave you a few "presents". They can also get impacted with the sand which isnt good.