The Stack System - Sasho MacKenzie and Marty Jertson in Lessons, Drills, Mental Game, and Fitness Tips Posted March 3 Impulse buy. I heard the interview with the Ping guy on WRX Golf On Spec podcast, and I ordered it right there. I was super disappointed to get the update they won’t ship until May. I have a knock off Super Speed set that I am staring the beginning sessions with. I will keep an eye on this. The guys seems pretty sharp, in my meaning open to ideas with a practical simple approach to make it work, which is what grabbed my attention.