If you want to make proper, precise remixes of the main CamLock hose end, the author does not provide STEP or other proper CAD source files. I remade his design and am providing the STEP file for anyone to work from.
The current model has no thread for the inside, as I figure this you probably want to change. I might add a version later.
There are no chamfers and fillets, just add them yourself.
Attention: there is no cutout for the magnets, again, adjust to your magnet size and preferences.
The author remixed this model.
Remade the file based on the STL, without chamfers and fillets, no thread at the back as option