This repository contains the hardware design files, CAD models (F3D, STEP, STL), and comprehensive documentation for the ERCF v2 (Enraged Rabbit Carrot Feeder version 2), a multi-material filament changer for 3D printers, primarily the Voron ecosystem. It is not a software application in the traditional sense—there is no executable code beyond configuration and scripting guides for Klipper firmware (Happy Hare plugin). The repo provides stl files for printing mechanical parts, CAD source files for modification, detailed assembly manuals (PDF), and step-by-step tutorials for hardware calibration, Klipper installation, and slicer setup. It also includes recommended optional add-ons (buffer, filament cutter, rewinder) and user-contributed modifications. The project is well-structured with clear directory layouts and extensive community support, evidenced by high stars and active issue tracking.