O.T.T. Nice to see you around again. It's basically Aluminum with O Matter. I know the flex couplers have been a nightmare for many years, and the X-Squared had seemed to work around it by making the connections points hex screws rather than rivets. But here the O Matter should flex enough to take the stress off, with essentially the same attachment points as the Splice.
They're very sturdy and I wouldn't worry about it.