Hello,
I suggest to change it that you have to give the wooden chest for upgrading the port.
A better way would be to give an item you can find in the chest (e.g. new item: “Port Upgrade Note”).
This would be much more rewarding and motivating for players doing the PRV - Fleets because they can keep the S woods.
Now you do a 1 hour mission for nothing than spending your looted chest.
Alex