1.) Click the large blue ‘Manage Your Pledge’ button -- to the right.
2.) Increase your pledge by the amount required for the add-ons you want. No need to select a new reward tier.
3.) Follow the prompts and you are done until the end the Kickstarter concludes.
4.) At the end of the Kickstarter campaign, we will send you a link to log into BackerKit where you can confirm your reward and add-on selection.