Hi Pilou - for construction the real problem is that for different kinds of path curves the amount of error with your method will be unknown until you measure each thing.

For a rendering or visualization purposes only, that should be ok but probably not as a basis for a physical construction.

Array curve just is not the right tool for this particular job - it does something different (making equal distances as traveled along a curve) than what is actually needed in this particular problem.

- Michael