I have a client that uses Shipstation. They have a store on a different platform that pushes dimensions into Shipstation to manage the shipping fees. How can I do that in Shopify? Should we do it all in Shipstation? It looks like I can align the products in Shipstation with products in Shopify via the SKU. But that would require adding new dimensions for every product in Shiptation and there are 1800 of them. Maybe that's what needs to happen, but it feels like a tall order. Any suggestions? Best practices?