Apparent V/R changes observed for the Hα and He I 6678 emission lines intercompared for two time segments. The variation in the shell He RV is also shown. An apparently anti-phase behaviour is observed in the second time interval, when the shell RV becomes quite negative and the He shell line blends with the V peak of the faint He emission. The same colours as in the previous time plots are used to distinguish spectra from individual observatories.