On a similar tack, I believe one of John Scott's tricks when demonstrating the St Paul's organ was to play the opening of the Fantasie in Eb (Saint-Saens), one hand played on the chancel organ, the other on the west trumpets. Instead of repeating the chords as written, he would play both chords simultaneously. Due to the delay, the result was exactly as Saint-Saens intended - apart from the registration!
G