IAN , please, no, I enjoy Tyros4 for its portability and great sounds. For me, it's fine.
Yes, I understand...the one that David's son plays is far from portable.
I will say it again, my friend, you really are a class act.
I really enjoy your arrangements and your skills with the Tyros, as well as your fine musicianship.
As Scott pointed out above, you have a 'recognizable" sound, and that's a good thing...you put your own stamp on the music.
Ian