He is playing the Fifty-Four Mark2 I did for him last year. He doesnt like the tonebars to loose.
MK2's are generally a bit shriller in tone , noticably in the high mids. Also the 54-version has a pretty unreliable harp , because the 2 plywood blocks dont have as much support from the metal frame of the harp. He plays through a Twin with weird JBL speakers (not the D120's)
I improved the action , in its dynamic response and general bang (for the buck) , ...the tines were pretty okay for a MK2 ...I have seen (felt/heard) worse. I compromised a bit on the stopping power of the dampers.
Here is a video where he plays a solo on his 1977 -- 73 keys with lots of effects , that one I intonated differently (not standard).
The midrange was a mix of 1977 and some 1974 and other tines that Jeroen exchanged during the years I remember.
http://www.youtube.com/watch?v=-IcA6beWS-4http://www.youtube.com/watch?v=HQasKMEsju0 hilarious :
http://www.youtube.com/watch?v=raBpmIBvj5s