Bryan,
I sent you a PDF of the Phelps Literature that I have. Let me know if it doesn't come through.
Phelps is an almost exact copy of the Star. I wouldn't say it's a cheap copy of a Star. the quality of many of the Phelps I have encountered is pretty much equivalent to Star's quality. However, I have run across other Phelps which were not nearly as good as Stars. In other words, there are some very good Phelps machines out there, but you can't depend consistent quality like you can with a Star.
I don't use an indexer, so I'm not sure if there would be a problem mounting a Moon indexer to a Phelps. I do know that the mounting hole pattern in a Phelps base is different than that of a Star base.