[Dominik]

We did a 59 Cadillac motor once with STD size pistons where we had to skip the next overbore straight to the following... 30 over wouldn't clean the bore.

Which we only realized once first oversize pistons had arrived. Maybe we should have quietly inserted the 30 over pistons and close it up again. Can you imagine that ring gap?

BTW, the rings cannot be 100% round if your bore is not exactly matched. The rings get more oval when you compress them. Unless they are made to be round when they butt.

But then they might as well come exactly gapped to begin with?

Yunick says they rotate at BDC and TDC