So I've recently designed the new PCB for Tetoroidiv and now I've tried adding an 80mm FFC to it.

The annoying thing about Fusion is that it will preview a 180 degree bend but will not actually allow the OK button to be pressed, so I had to work around it:

Then I click the bottom line with setting "Start" and the top line with setting "End".

Since there's space, I'm considering actually just soldering all the wires from Tetrinsic to the Tetoroidiv PCB and then potting the entire thing to achieve water protection. The less separate things I need to waterproof, the better, and if I use silicone, it seems (from the video below, timestamp 4:33) that it should be easily removable if needed: