G'Day Trent,
I haven't tried the Rainbow Optics Star Spectroscope, but I do have a Paton Hawkesley Star Analyser 100 which is very similar. The SA has 100lines/mm while the RO has 200l/mm, which in theory give greater dispersion that the SA.
I'm sure Ken or Bernard will chip in with comments about the RO (I'm not sure who else may have used the RO).
I purchased my SA direct from Paton Hawkesley, but I think I remember Matt at Telescopes-Astronomy in Adelaide also had them on his list.
I'm not aware of anyone making anything similar in Oz.
Al.
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