I managed to put a scratch in one of the bores while installing one of the pistons. It's enough to snag a nail and it's from the top ring not fully seating when I tapped it in. When I started moving the cylinder up, I heard it click into place... then I noticed the scratch. I don't have the mental energy to strip the block down and have it nikasiled... so I'm running it as is and hoping there isn't too much blow-by.
If it's awful... then I get to do this all over again!