Tomek Sopel enhanced user-facing tooltips for two core machines in the GTNewHorizons/GT5-Unofficial repository, focusing on aligning in-game documentation with actual gameplay mechanics. Working in Java, he refined the Precise Assembler’s tooltip to clarify operational modes, casing requirements, and performance scaling, directly addressing user confusion and reducing support needs. For the Universal Chemical Fuel Engine, Tomek expanded tooltip details to explain energy distribution, voiding conditions, and efficiency curves based on fuel and promoter ratios. His work emphasized game mechanics documentation and mod development, laying groundwork for future UX improvements and ensuring that technical information is both accurate and accessible.