That is good news about the cylinders and rings at least.My cylinders and rings were in great shape. I was pleasantly surprised.
The rod was tight to move back and forth so that's gotta be it. If it isn't, I'm going to replace the bearings as a precaution.
I have that same debris but a lot more of it.
There was plenty more come out of mine that what was in that picture. That was what washed out of the oil filter that sits in the sump. The sump itself was full of it.
Keep us updated with the condition of your shells when you have undone the conrod bolts.