help identify internal engine noise. wrist pin? piston?

[ChainsawMonkey]

So I have been investigating this noise it started as this
https://youtu.be/ZRl2txy2lmA
Which I assumed was a rod knock. After taking the engine apart I did find a bad tensioner. But I wasnt satisfied So I removed the heads and chains and everything else I could and I found this.
https://youtu.be/HCRMDNR1l58
https://youtu.be/DFoV6jwJ46E
https://youtu.be/OtHbK_YrbDI
https://youtu.be/7aBhM9YuTXk
https://youtu.be/IYPHM5sY1cw

I plastigaged the bearings rod and main and there both good. Im replacing them both anyways. I had also done a compression test before hand and it came up all good.
It sounds to me like its coming from one of the rear two pistons and I can almost feel it on one.
Now I dont know of a local machine shop I live way in the sticks. Is there a way that I would not need to replace the piston and hone the cyl? Can I change the wrist pin without doing so? Do you think its somthing else? Is there anything I could do that im not?

Thanks for any help.

 

[ChainsawMonkey]

the piston wrist pin and pin and rod seem for for that cyl. Not really sure what to think. I will post pics in the am.