For purposes of ship mass, due to their reduced volume, wedges and corner pieces should only have the mass of 1/2 and 1/3 of a full block, respecitvely. To prevent this from being used for light armor, though, they should also have their health reduced by the same amount.
Also, the contents of storage containers should be considered in mass calculations. Perhaps .1 or .01 mass per item stored (might not sound like much, but imagine you have 10k+ hulls from raiding a pirate base stored in your ship, and it starts to add up). This would make fast, dedicated supply ships a necessity for transporting goods, as well as escorts for them.
Also, the contents of storage containers should be considered in mass calculations. Perhaps .1 or .01 mass per item stored (might not sound like much, but imagine you have 10k+ hulls from raiding a pirate base stored in your ship, and it starts to add up). This would make fast, dedicated supply ships a necessity for transporting goods, as well as escorts for them.