My point is that you told the guy that this could have come from the metal lines in his tank, while these are clearly chips from a tap. I do not think he tapped his fuel lines. The biggest chip in the picture is about 1/8" long... so yes, I think you'd have a hard time passing that though a fuel line.

The advise I would give this member has already been given. Why should I repeat it? But for you peace of mind, here it goes: always disassemble, inspect and clean your new engines.

I am not just out to criticize you. I just expressed my opinion, like you did. Although I didn't quite spell it out, I thought that was clear from the post I made.
If I offended you in any way, I apologise.