after a bit of a layoff due to injury just wondering about some of the newer Dynamic Gold shaft options. I currently have R300 in my MP59s but previously had Superlight R300 in my previous set. After a session on the range yesterday i seem to be getting better control and accuracy with the SL shaft. Is this shaft discontinued now or has the Dynamic Gold 105 series taken the place for the lightweight steel option?? I also notice there's an AMT tour option in R300 but don't know much about that.