Hey PC!
The 2nd pivot assembly does look good. Only the thread should go all the way through the lug to get more “meat” for the bolt. What’s the inner Ø from the bearing 15mm? Is the thread M8? You could make it wider. M12x1.25 maybe.
The new version of the more complex pivot assembly doesn’t solve the potential problem I pointet out and it will be terrible to make. You could take the version before and add a long spacer between those inner rings.
-Thom