That sounds like a great addition to the Brantner Pack Edit Black Bird mod! The ability to choose different colors for the trailers and the option to select different capacities can add a lot of customization and variety to gameplay. Even though it may not be the most realistic feature, it definitely enhances the player's experience by giving them more control over the appearance and functionality of the trailers.
Having a complete color selection for the trailers can help players match them to their preferred color schemes or create unique combinations that suit their style. And the capacity selection is a practical feature that allows players to adjust the trailers' carrying capacity based on their needs for each specific task or crop type.
Overall, these updates offer more flexibility and personalization to players, making the mod more appealing and engaging. It's great that you were able to fulfill requests and provide these additional features for the community to enjoy!