You have a choice of the captive or non captive. The captive ones stay as an assembly nicer, wiggle the parts together in the open position Until they snap in place. They will need support everywhere to print.

The non captive lets you see the snail hinge in action. It also won’t need support.

Have fun with it :). I included the Fusion360 file if you want to modify the roll diameter. If there is interest I will make it more parametric.