Turn an old organ console into a MIDI controller to use with desktop organ software like Hauptwerk or Grandorgue.
A device that turns the registry in the organs on and off, and remembers the settings. It also supports crescendo.
Creating a playable modern virtual MIDI-based Vox Continental (or any other keyboard)
Cantor analog organ conversion to MIDI-controler for Virtual Pipe Organ (GrandOrgue, Hauptwerk)