Wishbone assembly (each tube &c is an individual part or subassembly) with rod ends. Designed to be partially externally driven (by linking pivot points and outer rod end at design position to external skeleton file) but can be used as 'stand alone'. Proper procedure (after establishing aforementioned point locations) is selecting desired rod ends (each has it's design table) and required tube dimensions (sketches are located in skeleton part). Should model fall apart, it can easily be repaired by adjusting length of main tube and/or moving TubeX point (in skeleton part) which represents distance of front and rear tube intersection from end of main tube... (sounds much more complicated than it really is)