My S65 failed last October at Road America. Main bearing 1 failure led to rod bearing failure. Link to thread about the process of tear down and learnings here:
https://www.m3post.com/forums/showthread.php?t=2210858
* Please note that the chassis is a 2008 but the engine build date is unkown. The engine had 14k miles on a rebuild with new rod bearings.
Rubin