It would be nice if ShipStation added the feature to allow custom package weights. That way, when you choose your custom package, the additional weight will be added as well to account for the box and void filler weight.
I understand that ShipStation automatically pulls the weights for all of the SKU's in the order, but what's the point if you still have to manually enter the additional weight to account for your box and void filler? You might as well go ahead and weigh the entire package before shipping at that point. Which is what we're having to do now...... Would be able to ship about 4x as many orders if this was a feature.