Hey just wondering if you have any advice for my situation. I'm going to offer payment plans for my product being 50% upfront and 50% at a later date. The product is already made and when ordered will start being shipped within days. I'm planning to use a shopify app that will take the inital payment and second payment from the previously used card on a chosen date. My problem is that if they fail to make the second payment they will get the product for 50% off as once it is shipped it's completely out of my hands and I can't cancel it. Is this a reasonable concern? Do you have any ways you would structure payment plans differently in my situation?