GoPro case insert which can store the next items:
-GoPro Hero 9 - 13 (or any other similar formfactor cameras)
-Ultrawide lens (or any other similar rubber cover lenses)
-Headband
-Hero 13 battery charger
-2pcs of original GoPro quick release mount
-It is not included in the print, but I left enough space for a floaty too

For the camera space, I left a bigger space, so you can add a felt or any insert to avoid skretches.