Since I got a couple Kodak Instamatic cameras for real cheap on some yard sales I wanted to take some pictures with them. I was not able to find any free 126 film replacement and nothing 3d printable to download, so here it is for everyone with a Instamatic or a compatibel camera at home.
I had to remove the film retention pin in the camera, because it was damaging the sprocket holes. To use this replacement cartridge only one M3 screw is necessary to screw the film spool together. I have not tested black pla, rather have i used black tape to lightproof the cardridge. There are some very good youtube videos on how to reload old 126 cardridges with 35mm film, the best is to follow those on how to load my cardridge.