As soon as you publish new post, this post will be available in your RSS feed. And RSS readers will cache the feed as soon as detect it. If you made an error in the post, it will be impossible to have correct version in the feed.
GD Press Tools Pro allows you to easily control delay between publishing the post and post being available in the RSS feed. Enable the feature, set number of minutes for the delay and it is done. If you notice some errors, you will have 5 or 10 or more minutes to fix it before it is in the feed. Open plugin Settings panel, and on the RSS tab you will find this option.