I needed a gridfinity box for https://www.temu.com/goods.html?_bg_fs=1&goods_id=601099515502886&sku_id=17592208825134&_x_sessn_id=l1owbsl7l9&refer_page_name=bgt_order_detail&refer_page_id=10045_1743434675525_g4gnwwqu72&refer_page_sn=10045

Inspired by https://www.printables.com/model/502789-head-mount-magnifier-with-holder-for-gridfinity/comments (thanks!) I made this, which has cutouts to save space and filament.

Print in PLA/PETG, 15% adaptive cubic infill, and only 2 bottom, 2 top shell layers to save filament.