"Sierra Space is developing one - https://youtu.be/_7NiBD3KqkQ?si=5jYKgUWHTkpxIbN4"

"Technically, it’s still isogrid just with no face sheet. There’s also a ton of designs in the consumer side with isogrid, many injection molded parts have an isogrid on the B side of the part. The other main aerospace grid style is orthogrid. Orthogrid can be stronger in certain directions but unlike isogrid, it needs a face sheet to carry shear, otherwise the orthogrid would collapse (like a cardboard wine box insert)."

"Worth checking out the TechnipFMC Gemini Robot. It's hard to find many videos about it but there's a lot of novel tech and design in some of these deep sea machines. Here are two links: https://www.youtube.com/watch?v=3TgUGco4xQE https://www.technipfmc.com/en/what-we-do/subsea/Robotics/rov-systems"