I iterated on this for quite a while. Here are some highlights.

There are three types of snap-fits (design guide):

• Annular - the kind you find on a pen cap
• Cantilever - the most common joint
• Torsion - as best I can tell, these are defined by having a lever connected to the joint for release

I believe all of these snap fits are cantilevers but I am a little unsure about the ones that hold the board in. There’s not much of an arm to deflect.