To be clear, I have no association with this project other than that I linked to it earlier in this thread. I didn’t realize the file linked on the online challenge site required a permission request to download, and I figured I’d save people the trouble of doing that plus installing F360 if they haven’t already.
The below image (from the online challenge entry) shows the complete assembly without the controller. You can see that the links are held together with screws and nylock nuts (I’d guess #8), and that there’s a metal rod (origin and dimensions currently unknown to me) that holds the clamshell piece together.
Not to be rude, but please check before posting, especially on a topic 1 month old, especially since the file has already been posted a few posts above