Latest panettone bake and analysis

Every panettone bake is an experiment in one or more ways. This one was a trial of a chocolate panettone recipe which intrigued me because of its ingredients.
First, it uses cocoa powder, rather than a ganache. This is easier and less costly than the cocoa mass-based approach, and also lighter. Second, it is quite high in egg yolks compared to most recipes. I wondered how this would affect the crumb; certainly the photos were encouraging.