Hi Pilou, in your example file the cone centers are not all at the same "straight line" distance from one another.

For example here I drew 2 lines in between some of the cone tips.

This line is 1.13 units long (actually 1.1263 with more digits if you open up the size edit panel).



This line is 1.11 units long (more digits: 1.1143):



So actually more than 0.01 units deviation between them.

It basically needs a different technique, to generate a set of lines that are all equal sized, to get better uniformity in the results.

- Michael