Eric B. on Instagram: "TaylorMade Qi4D Release Thoughts: The Qi4D isn’t a landmark release (like when CarbonWood was introduced with the Stealth). Instead, it’s a refinement; another round of sharpening the scalpel—the first iteration being the Qi10 and Qi35 being the second. There are four Qi4D models: The Qi4D Core, Qi4D LS, Qi4D MAX and Qi4D MAX LITE. Each of the Qi4D drivers retail for $650. Likewise, each of the drivers features a refined design that new aerodynamic features (faster through