April 2025 monthly summary for TerraFirmaGreg-Team/Modpack-Modern: Key feature delivered is the Concrete Recipe Overhaul and Expanded Stonecutting Options. This work refactors the GregTech concrete workflow by removing outdated recipes and introducing new ones for fluid solidification and chemical baths, and expands stonecutting recipes to include light and dark concrete variants, increasing builder flexibility and aesthetic options. The primary bug fix completed is the GT light/dark concrete recipe fix (#820), addressing recipe conflicts and ensuring reliable crafting progression. Overall impact: Enhanced modpack usability and player experience by simplifying crafting paths, reducing confusion, and accelerating progression for builders. The changes also lay groundwork for future materials customization and consistency across related concrete variants. Technologies/skills demonstrated: Java-based modding practices, GregTech/recipe registry refactoring, data-driven recipe configuration, and robust commit-driven development. Focused on maintainability, testability, and clear mapping between in-game materials and their crafting workflows.