Thanks for these links I don´t understand any french but these are anyway very helpful. The construction lines scripts are also great. Only challenge that I have for construction lines is that I don´t really understand what is the best way to offset the construction line. Somehow I am not able to define/lock the axis that the construction lines are drawn.

I will take a look of the Elephant nodal system later this week. It is good to know that there could be some help for this instancing challenge also.