Extraordinary post. To be honest, didn’t even strike me to use TPU for shear resistance. But of course. Good rookie tip among much in there. Fantastic work.
I think it was a Maker's Muse video where I learned a ton about different 3D printable materials' shear strength when he was testing them in tiny battlebot-style robots. Some things feel unintuitive but I'm glad people take the time to test them and share their results!
You can even get carbon fiber reinforced TPU for if you want shear strength but don't need the flexibility. From what I hear it's kind of bonkers how tough that stuff is.