Yes, this approach is called parametric design. FreeCAD struggled with the topological naming problem for quite some time, which basically means that internally named things, and references to them, can break under certain situations. Exposure to this problem increased as the thing getting molded became more complicated, which seemed maddening from a user's perspective. It seems like it may have been fixed in the main branch somewhat recently, which I was not aware of. That's good news.
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