To clarify... I've never seen a burn with a PO peak of 0, I have seen an average of 0. The best I've seen so far is a PI Peak of 37, PI average of 7, PO Peak of 31, and a PO "average" (we're missing a little precision here because anything > 0 can't average to 0) of 0. This was with 8x Memorex media burned on my NEC 3520A at 4x. Interestingly enough the first time I scanned it, DIP gave me a PI Peak of 697, PI avg of 6, PO Peak of 693 and PO avg of 0. I makes me wonder what the standard deviation would be if I were to run 100 scans? I wouldn't suppose that data exists does it (I doubt it because it would probably differ from drive to drive)?