Thanks for the link David. I shall take a look later. It's about time someone challenged Hauptwerk's domination of the paid-for organ simulation market.
The Physical modelling and real-time synthesis approach dates back to the researches of my good friends the late Dr Peter Comerford & Dr Lucy Comerford at Bradford University. The system has been used at various times over the years by certain digital organ builders. Copeman-Hart used a broadly similar real-time synthesis approach (not sure what they do now Makin have taken them over) More recently, Viscount Organs have introduced a system using physical modelling. I was very impressed by the demo I had at Promenade Music when they launched the range, and a few years later a small inheritance made it possible for me to purchase an example as my home practice instrument. To my ears, it sounds better than any other recent digital organ - even after 4 or so years of ownership.