I recently found out that 1D Surface spring supports are applied to the nodes on that surface equally, not accounting for element size associated with a node.
This means that if one area of the same surface has a finer mesh, it will have a higher spring stiffness. It makes the surface spring support tool much less useful.
This would be resolved if the nodal spring stiffness at a node (derived from the surface spring support) is proportioned based on its associated surface area.