Worked on the DUNE/dunecore repository to deliver Version 7 GDML geometry definitions for 1x8x14 and 2x8x40 detector configurations, focusing on improving simulation fidelity and geometric accuracy. Used Perl scripting and XML to refine the bottom CRP geometry by adjusting Z-positions, which reduced gaps and addressed an issue where the bottom geometry created overly large separations between CRUs. This update provided a more realistic and consistent detector model, with all changes committed as a clean, traceable patch set. The work emphasized detector design and simulation, enhancing the reliability of geometry definitions for ongoing and future detector studies.