78 yrs old, playing golf 60+ yrs old with a driver swg. spd. of 80-83 mph. Play 2-3 times/week at the Clemson Univ. golf course. In the past, attended Golfsmiths club building schools (2) at their headquarters in Texas. Great school and instructors. Nothing but golf 8 hours/ day all week. Actually built yourself a set of irons. The advanced school had you grinding wedges with different bounces and other club making techniques. Still have my frequency meter and my loft & lie bending machine.