I tried to make a working vintage electric organ in Blender (with help of some addons)! This is the Delicia Vega organ, but I'll try to make some others (Ionika, Lowrey, Yamaha, and some fictional ones), and I'll maybe use them in some vocal synth songs!
The organ is controllable from the Yamaha PSR keyboard via MIDI. It also reacts to the expression pedal. Some parameters are also adjustable right on the 3D model. This video shows the drawbar section and the built-in auto-rhythm machine.