From FreeCAD Documentation
- While it is possible to use Attachment to align them, the attachment won't be parametrically linked.
- Attachment can be applied to a PartDesign feature. This and features depending on it are repositioned according to the base geometry. But!:
- Independent PartDesign features won't move and so it will change the resulting shape and break it in the end.
- We are advised to keep features independent to avoid impacts due to the Topological naming problem.
- PartDesign Clone creates a body with a single feature that can be use with Attachment.