Anselmo Meregaglia developed Version 7 GDML geometry definitions for the DUNE/dunecore repository, focusing on the 1x8x14 and 2x8x40 detector configurations. He refined the bottom CRP geometry by adjusting Z-positions, which reduced excessive gaps between CRUs and improved the overall accuracy of the detector model. Using Perl scripting and XML for geometry definition and simulation, Anselmo addressed geometry-related uncertainties and enhanced simulation fidelity. His work resulted in a clean, commit-traceable patch set that improved the consistency and realism of the detector’s geometric representation, demonstrating a strong grasp of detector design and simulation best practices.