It would be greatly beneficial if ShipCenter had a user-friendly way to define conditional shipping rules in some sort of module. This could be like SalesPad Mobile filters. You select your object, the operator, and the end value. For an example of one would be Feild name "SalesDocument.Subtotal > 300" then "Freight = 0." This would allow admin users to define shipping rules to meet their criteria and add value to ShipCenter.