Stema Trius High Capacity Fast Unload

Hey everyone! Are you tired of not being able to transport enough with your car? This mod is for you!
I've updated the Stema Trius trailer with two capacity options:
- Low capacity: 15,000 liters
- High capacity: 30,000 liters
Higher capacity means faster unloading, making your work more efficient. Both options come with increased unload speeds.