Nice results Oskar.
The lines are weak in the Rigel spectrum because the lines are narrow in giant stars. The resolution of the Star Analyser is too low to show them well. Compare Supergiant Rigel (B8i) with main sequence Regulus (B8v) for example. They are similar temperature but the Balmer lines in Regulus are wider and show up better in Star Analyser spectra)
This I will do, but I have to wait until next springtime. With some experience now with the StarAnalyser, I think, I have the most benefit from it, when I compare stars with it as I did in my little work shown here.