The easiest way to add your shipping is to look to the right of the video at the top of the screen, and you'll see a big button that says "Manage My Pledge". Click that button and it will take you to the screen where you'll make those changes. Sometimes this button is hiding if you are using the app or a pop-up blocker, so making these changes from a tablet or home computer is best.
Since you have to add $25 for shipping, you just need to add this value to your current pledge, which should be located in a white box with a green outline at the top of the page.
For instance, if you pledged the $144 reward tier, just change the number in the box to $169. Remember to save your changes!
Yes, you may see a popup or notice that says "no shipping" - this is already built into the total pledge you just entered.
We decided not to "force add" shipping as a separate item as we have lots of backers who are taking advantage of local pickup. We also wanted to make sure our international buyers were paying shipping based on their location, instead of one high flat rate for everyone.