Smart Component Configurations

Has anyone had any luck creating smart components with alternate "smart" configurations? Say I have a common bracket that has mounting screws. The bracket uses different mounting hardware depending on the material it is mounted to. I would love to be able to add this part to an assembly and choose from alternate smart hardware to mount it. I have tried adding configurations in the smart component editor (_ta), but the are hidden when smartifying the part in an assembly. The Configurator Table makes no sense in the smart component feature either.....

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