Pile renumbering - need spline assistance

[Yna_Db]

Wouldn’t be easier to make use of the grids (if there are any in the project)?

Begin and endpoint of a wall linked to the closest intersection of grids

It would be simpler to code this indeed, but I found the challenge interesting and I built something that seems to work: [image] The png should be clear enough (if you open it in a new window or download it). If you have the patience to rebuild it, I’ll be glad to answer to any question. String.Contains and Clear List are from Archi-lab Grimshaw, Geometry Intersection is from Dynamo4MEP, All Elements of Family Type (Universal) is from Clockwork and finally, Springs.Dictionary.ByKeysValues is…