I am assembling a tripod. I have 3 subassemblies. 1) Center assembly with 3 struts. The struts move angularly vs the base. Each strut has a pivot hole each end. 2) Leg assembly. This leg assembly is a telescoping tube assembly. It has a collar with an inside attachment for the strut. The top cap has a hole that aligns with a pair of holes in the top base. 3) Foot assembly. It is round base with a "ball"