Planetarium visits limit the amount of time and agency people have to explore content relevant to their interest and identities as compared to other informal learning environments. We developed the Dome+ model to guide extending engagement beyond planetariums based on the design principles of identity, interest, and choice. We do this through web resources, social media, and hands-on activities centered on a planetarium show. We present research into the development and implementation of the Dome+ model as it applies to the Big Astronomy Project. This is a multi-institutional effort to share the stories of the people and places that make astronomy happen. The work presented focuses on the implementation of the model during production of the planetarium show. We interviewed team members key in the production of the show and find themes that differ based on project role. We also discuss practical challenges in implementing the Dome+ model.