This is a 2 way print in place hinge, so if you want it to swing both ways you'll have to keep 1 space gap in between.
This needs supports I used tree support with 2% threshold on my P1S and it worked perfect. You don't want the supports to touch the snaps or they might not fit in the holes right. https://media.giphy.com/media/v1.Y2lkPTc5MGI3NjExc3FpZXg2ZXoyNnZ5YXl0c2dqamRvZGE3Z2tyNWtwc3VxeHZ5d3UzZiZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/r6ULTuuD7BSkXduxPu/giphy-downsized-large.gif I used the hinge from this https://www.thingiverse.com/thing:1034229