Is the weight penalty of an extra shock and lever arm worth the benefits of a fully floating axle path? The axle path is a big factor in the ability of a frame, and all axle paths have a certain draw back ranging from bad large bump compliance, geometry fluctuations that affect jumping/cornering abilities, and chain squat/stretch, not to mention sub-optimal axle path in relation to the impact location on the wheel will result in loss of momentum. What if the axle path automatically changes to suit your current terrain? What if your chain stays the perfect tension through all of its travel??(chain tension device not shown in image) Imagine a suspension design that corners like a 4x bike, handles large bumps like a very high pivot point frame, yet also has a chain stretch optimal for pedaling efficiency similar to a performance XC bike.