Tag Leader intersection

Hello to All,
I have a question regarding the tag leaders. Is it possible to detect intersections between leaders? I manage to detect intersection of the tag heads (by location point and offset points) but for the leader, I do not know how to get leader line points (before elbow).

As far as I can see, I can set (and get) leader end point and point of the elbow. Hence tagged element can be anywhere in the view Vector from the start point and elbow cannot be determined. Moreover, start point of the elbow can not be set (as far as I know).

Any suggestions?

Thank you in advance.