As a member you can order add-on kits at any time. We will provide you with a coupon code that gives you a 15% discount on your add-on kits. If you order your add-on kits prior to your Mainkit shipping, we will ship it free along with your Main kit! Don't worry if you forget to include the coupon code at checkout as we will always make sure the member discount gets applied + free shipping. When you place your order for add-on kits, your receipt will show a shipping charge - don't worry as we will remove the shipping charge when we process the order. If you would like us to place your order for you, just drop us an email and we will take care of it for you!