I created this gridfinity icon torx bit holder in gridfinity generator i measured the size of the bits to size the holes with. The holes are 18.00mmx18.00mmx12.00mm except for the T55 that hole is 17.90mmx17.90mmx12.00mm when adding the depth of each hole i have it at 20mm you can change size or depth to match your hex bit sizes! This is my first design i made i hope you like it!