During January 2025, Danny developed a hopper subsystem simulation for the SciBorgs/Reefscape-2025 repository, enabling hardware-free development and testing. He leveraged Java and applied skills in robot simulation and subsystem development, integrating DCMotorSim and LinearSystemId to realistically model hopper dynamics. Danny introduced new configuration constants to facilitate parameter exploration and more accurate control tuning. To ensure deterministic and repeatable tests, he implemented a simulated beambreak sensor, currently hardcoded for stability during initial validation. His work established a robust baseline for future simulation enhancements, laying the foundation for more configurable sensor models and supporting efficient, hardware-independent subsystem development workflows.