The rocker box. Simple furniture glides for both the altitude and azimuth. The azimuth slides on a peel and stick linoleum floor tile.
The azimuth tension is adjusted by a lock nut on bolt through the tripod and rocker.
The legs are attached with hinges and the top of the legs are beveled to achieve the angle of leg spread desired. They cannot splay out, so no safety chain or other spreader is required.