Wife and I both started out as organ builders, or at least, technicians/tuners.
Included an opus at a church on SoCal’s Catalina Island. Also, the bossman, years later, designed and supervised the construction of the organ at LA’s Disney Concert Hall.
Carol Willams plays a beautiful composition on that organ, “Twilight”. https://www.youtube.com/watch?v=hglUzmDAfwU There’s no sheet music that I know of, but I managed to figure most of it out by ear.