Theme Horse

I now have some major concerns that I bought into a problem that will compound down the road. I want to get some things straight before I go any further with using your templates and keeping my account active.

If I do not manually change the code through the editor and only add changes to the css through the custom css, I can then upgrade without having to change or re-enter anything…including the custom css?

If I have a custom header, set up all the layout and design…nothing will change?