Update: My friend returned from his trip and said it worked great. I have received some comments that the latch is weak. If you redesign, please post. I have also added a separated top & bottom step files so you can print in 2 pieces for smaller beds. It's a 2mm hole for the hinge so 1.75mm PLA melted on both sides might work. Or, you could use M2 screws. I haven't tried it. Please post if you do.
I made this controller case for a friend who keeps his Legion Go screen in a separate sleeve, but didn't want the controllers banging around in a backpack. The connector piece is labeled left and right for easy of orientation when connecting to controllers. Controllers go upside down on pegs. I just gave it to him and he's headed on a big trip so we will see how it wears.
This is my first attempt at a clamshell box type design.