Years ago, Head came out with the iPrestige -- still my all-time favorite racquet. It had intellifibers, which supposedly stiffened the racquet on contact. Then there was liquidmetal. Then flexpoint. Then microgel. Now, d3O. If the previous technologies were advances, why aren't they arround anymore? In other words, why isn't the "Youtek Prestige" actually the "Youtek Flexpoint Microgel Liquidmetal iPrestige"? If they weren't advances, why did Head promote them as such? Or am I missing something? Maybe you just can't combine liquidmetal with d3O, or microgel with flexpoint holes?