I’ve purchased the premium FedEx plugin. Is there a way to edit the weight of a pre-set FedEx box to account for extra shipping packaging that varies per box not per product? The weight field looks editable in all your screenshots and in the backend, but I am unable to modify the field.

I thought about duplicating the Fedex box sizes into the custom field section, but FedEx gives discounted rates for using their standard boxes, so this method would over-charge us.