That’s good news Harold. I’ve always had to use octane to get to maximum advance without the ping. Each time I fuel up I measure the gas to octane ratio exactly the same so I can leave the advance at its maximum, just short of the ping. Though many won’t agree, I also keep my temp under 180. Any hotter I can get a ping under WOT unless I retard the timing a bit. It just runs stronger with the extra advance. It’s not a daily driver, so for me the mixing is well worth it.