Once you place an order, we set up your project in our production system. We will send you an Order Review to look over and approve before we start manufacturing. It is your responsibility to ensure all the sizes and details provided are correct. If there is a discrepancy, please let us know at this time. If you need to add or subtract a door, this would be the time to do so. If you add a door, we will send you an invoice for it through our online payment system, Stripe.