This is interesting, trying to figure this out. I remember you turning Legend, Mantis, it was a short while before I did and the reason I remember was because I was right with you average-wise and didn't know exactly what the turning point was. I had to be careful not to make the leap as I would have been disqualified from the TM Ryder Cup team so I played a lot of AS and stayed away from stroke play at SA and RGs.
After the final match I was at 62.08 and went straight to SA B9 and shot 28 to get over. The only obvious difference I see between Sarge, TBE and myself is the number of ranked rounds played. Perhaps that has something to do with the actual number you flip at.