Salt Shaker mute as cup mute?

[ghmerrill]

I have my current one set up very effectively as sounding like a bucket mute. It's been said that the Salt Shaker mute can be configured to achieve the effect of a cup mute. Has anyone reading this accomplished that? If so, exactly what did you do with the felt baffles and the end cap(s) to get there? Or do you use it as a kind of "double purpose" cup/bucket mute?