Hi Bill,
I have always been a fan of the Wersi organ sound as long as I can remember. I think the first one I heard was the Helios, but my memory may serve me incorrectly there. Even as a young lad I went to see the late great Klaus Wunderlich in concert a few times. I always found him to be quite grumpy unfortunately, but he did sign one of his albums for me once! He is very much missed.
Anyway, I am sure you are already aware of this young guy... He is without doubt my favourite youtube organ performer (unless you can show me better!). Here is a clip of him playing his rather spectacular Wersi Gala 900 (
http://www.youtube.com/watch?v=S31vDckEIUg ) I really would like to chop his fingers off and attach them to my hand. I just can't believe his speed. Enjoy!