I'm new to Concrete5, and I wanted to start with the Elemental theme and make style changes to it from a CSS file in such a way that my changes won't get overwritten next time something updates. This seemed to me like something fairly basic, but I was unable to find complete information on how to do this in one place, so, now that I think I've accomplished my goal, I thought I would post my method and ask if I'm missing anything. Some of this is copied from other posts, some is purely my own.

1) Copy the 'concrete/themes/elemental' folder into 'application/themes/name' (change "name" to an appropriate name for the theme)
2) Open the 'application/themes/name/page_theme.php' file and change namespace from

to
(note caps)
3) Also in page_theme.php, adjust to "Theme Name" and to "Theme Description" (or whatever the appropriate theme name and description are).
4) In main.less adjust

to

5) In header_top.php, add
(where "name" is the name of your new stylesheet)
after the call to main.less, and then create name.css in the new theme css folder. Add a few style changes so you can test if it's working.
6) Login to the site's dashboard and activate the new theme.

This seems to have overridden the Elemental theme with a new theme copied from Elemental that loads Elemental styles followed by my own styles.

Because I had such a hard time finding this information, there is probably a better way. Please let me know if this is going to work and what could be improved.