Wedding Day at Troldhaugen Grieg - Piano transcription on a 6 manual organ

I first heard this arrangement of Wedding Day at Troldhaugen on Lyn Larsen, Carlo Curley CD; Dueling Organs (I assume their arrangement). I have played this on 2 theatre pipe organs - One for a concert at Marrickville Town Hall (Sydney) in 1990 and on the Wurlitzer in the Egyptian Hall at the Wanamaker (Macy's) store Philadelphia 2012. This is my home organ (6 manual- approx 180 stops). I have put this together from a 100 plus year old Estey Reed organ, 2 digital keyboards, 3 Hauptwerk and 1 Grandorgue computer organs and an Ahlborn Galanti MIDI organ module. Here, using all 6 manuals of digital theatre organ.... as far as I know, the only one in existence?