About this 3D model
Overview: https://www.myminifactory.com/object/3d-print-65328 print one Trader ship for each Player: The trader ship has to be placed near a harbor (not the 3:1) to indicate that this player can trade this specific ressource with a ratio of 2:1 Open design in Tinkercad: https://www.tinkercad.com/things/1a8pHcm8nDB