Heavy weight upper clamps improve durability in hard crashes and accommodate the inner surprise mounting system. The top of clamps utilize caster inserts for easy and quick set-up modifications, while having centering pins for accurate installation and enhanced crash dependability. The screws installed through the base with this caster inserts capture the inserts in top clamps to secure the inserts while servicing the car. The screws in addition act as top of the hands pivot ball mounts, reducing the amount of elements in the create and reducing weight. Top of the clamps and caster inserts are made from premium Swiss 7075 T6 aluminum and black colored anodized.