Toney Covey's Recent blog, titled as above, was a revelation for me. My driver SS is 90-100, hasn't changed in years. The M1 is the longest driver I ever hit: avg 230 total with 220 carry, capable of 250-260. My M1-460cc is 9.5* with the stock Fujikura Pro60 Stiff. At neutral settings, I hit it 200, but increasing loft setting 2* got me 30 more yds. Only problem was, increasing loft on an M1 automatically closes the face; the two adjustments are inseparable. The 2* uploft closed the face 4*. No way to prevent it. So, to get 30 more yards of distance, I had to fight a pull hook all day. For 30 more yds? You bet! Then along comes Toney's article. So i moved both weights to the extreme rear, moving CG back. This increased dynamic loft, higher trajectory, more distance -- maybe. But the amazing thing was it eliminated side spin! The club is now a point-and-shoot howitzer. I now step into the tee box with confidence my drives are going to go and finish at least in the general vicinity of where I'm aiming. Apparently rear club weighting is a good thing, and I'm looking for my lead tape. Anybody out there have a similar experience?