In replacing Guru Tragphur with Dorje Drollo in, say, the Short Tun, does he act as a direct substitute in the waxing moon phase, or does he also substitute for Simhamukha in the waning phase.
It seems that Yidam practices begin in a similar way to the Tun and continue into the natural state, so presumably the Yidam practice of Dorje Drollo or Guru Tragphur do so as well. I'm assuming this is quite different from their role in the Tun?

