Our schematics have redundant circuit blocks (e.g. Phase A, Phase B, Phase C) that all have the same master block. In the case of high voltage design, each block has to be physically isolated from the others. If you add the "Cluster" property to all of the symbols in an instantiation, the edit shows up in the master block and all instantiations. How can one set different values of the cluster property for each block instantiation?