How to Add a Custom RSS Feed in WordPress

If you ever need to create a custom RSS feed, here is the basic process:

1. Get the original RSS template (feed-rss2.php, feed-rss.php, or feed-atom.php)
2. Save the file as another name and customize it how you need
3. Convert the template into a custom page template by adding /* Theme Name: Custom RSS */
4. Assign a new page the RSS template
5. Should now work as your new RSS page