We noticed that some of the original references do not have short grooves at the locations marked in the image below. All are movie / screen accurate models and we included all versions in the pack as a FREE update. Thank you. Learn more at https://www.do3d.com/product-page/daredevil-v2-helmet-matt-murdock-mask-3d-printable-model-print-file-stl-d498 🙏 Do3D gives free life time updates to all valid purchases made directly on do3d.com. Thank you very much for your support!This is another version included in the file pack.