I want to create a coincident relationship between:

1. the end point of a construction line in a 3d sketch,

2. the center of mass of a weldment.

From this I can position a lifting lug on the other end of the construction line and have the weldment hang at an angle specifed by the direction of the construction line.

This would also allow the lug to adjust position as the weldment evolves over time.

Does anyone know a technique to do this?

Dazza