I am strongly considering your AP3 irons with AMT black (stiff) shafts. Launch monitor specs indicate I am just inside the range(ball speed off face, etc.) to use a stiff flex. I'm currently a 12 handicap, overall game and swing is improving. Scores are slowly going lower as well. 66 years old and 7 iron distance is 155 to 165yds. It was recommended to soft step AMT black shafts. Is that an option with ascending mass shaft technology? Your thoughts and expertise are welcomed.