Some additional words from the master. No not me! but Christian Buil who’s work with a simple school lab diffraction grating got me into this game.
The theory and early experiments.
http://www.astrosurf.com/buil/us/spe1/spectro1.htm
Star Analyser review and tips
http://www.astrosurf.com/buil/staranalyser2/evaluation_en.htm
http://www.astrosurf.com/buil/staranalyser/obs.htm
http://www.astrosurf.com/aras/staranalyser/userguide.htm
(Dont worry at this stage about the wedge prism he uses, it is available as an accessory but only improves the resolution of the SA100 slightly and makes life more complicated for the beginner.)
Robin