Here is a cool 'mechanics trick' for anyone who might be interested in physically-locating the pivot points of bindings that deploy 'virtual pivots' ( as taught to me by Gordon Lipe ):
Step 1: measure the system's peak release torque (utilize, for example, a VT Release Calibrator).
Step 2: measure the force at the end of the boot that releases (utilize, for example, a Lipe Release Check, or a Winterstieger machine).
Step 3: divide the force into the torque. This step will give you the length of the lever arm from the point of application of the applied force to the point of rotation of the boot (relative to the ski) at peak release.
Step 4: add the distance from the point of application of the force to the end of the boot nearest the force-application device.
Step 5: subtract the value derived in Step 4 from the boot sole length. The 'pivot-point' (at peak release; for that mode of release) will be located at that point.