Nate,
Every starter has different characteristics so you will need to do a lot of experimenting to find what regimen works best for the one you have captured. Through trial-and-error you'll learn how your pizzas turn out as you make changes to the temperatures, times, and amount of starter. Having a way to control the temperature is not a requirement, but can be extremely helpful in figuring this all out. A few degrees difference over a few days can make a big difference in the final crust.