If you want to set up a specific shipping model for products that are brought through the Customizer please follow the instructions below.
First of you need to locate the “Shipping profile” page in your Shopify settings. This can be found under the “Shipping” section.
Under “Rates at checkout” please click the button “Create new profile”.
Here you can search and find the product “Your Customized Product”. This is the product that SPOD uses to process any orders that come through the Customizer.
Then you can set up a shipping profile to your specific requirements, and this will apply only to items that are brought by your customers through the Customizer.