In going through archived files for the MACPOD Ski Boot Project I found a photo of the first injection molded ski boot prototype based on the principles of the Birdcage.
The photo below is of the Birdcage research vehicle that was used to validate my hypothesis that explained the mechanism by which elite skiers establish dynamic stability of the platform under the outside foot of a turn by balancing torques in two planes across the inside edge. This mechanism extends GRF acting along the running surface of the edge out under the platform for the skier to stand and balance on.
The photo below is of the Logan Chassis (aka The Convincer) that was developed in conjunction with the first injection molded ski boot prototype based on the principles of the Birdcage.
The photo below is of the first injection molded ski boot prototype. It was called the MACPOD boot. The design and format were very good. But the stiffness of the plastics, which were stiffer than used in conventional ski boots, was many orders too low on the scale of shore hardness. A subsequent effort called the Rise boot suffered from the same problem. It was a lack of suitable materials and manufacturing technologies that eventually sealed the fate of the MACPOD ski boot project.