My homepage is set up with excerpts of my most recent posts plus a thumbnail of the feature image and Read More link. See it here: http://practicallyfunctional.com/
I would like to leave those excerpts exactly as they are (they are the auto-generated ones), but I would like to create a longer manually entered excerpt that includes the first image in the post to be used for my RSS feed. Right now it seems like I have to use the same excerpt for RSS and my homepage, tag, archive, and category pages.
Is there a way to leave the excerpts on the site as they are now and specify a separate manual excerpt for RSS?