Ring Gap?

Manufactures set standards because they have engineers and research to back it up. It is best practice to follow their advice. Now that's not to say that there aren't other people doing other things that (get by) work. Such as knurling pistons or valve guides. But not in my motor that I want to hold together and last. Build it right or build it twice. And yes, I agree with others. Bore taper is more important.