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Don't just use your slider on the tripod; extend it with the YC Onion Stability Arms to create extra support and stability. These adjustable arms can be extended from 58 to 95 cm, allowing you to use them as you wish.
Mount your slider on the tripod, then attach the arms. The bottom of the arms attaches to the legs of the tripod, and the top screws into the bottom of the slider. On the leg side, the arms have a bracket clamp with a mini ball head. On the top is a mini ball head with a 1/4-20 screw that screws into the bottom of the supporting sliders.