hi steve,whether you agree or not ,at least you are listening,mike (idatrod) ,brought up an important point on this issue and that was if you are playing chords with the left hand example C7,quite often the adjoining black keys Gb and Ab press down with the G and so giving a dischord ,your last post says that you put full size keys on 2 of your keyboards,why not put full size keys on your TOP ARRANGER KEYBOARDS ONLY,you are already using these larger keys so the cost would not be a problem,look at the benefits,a lot of people will be spending more money by choosing a top of the range board rather than settling for a yamaha mediocre board,for example when i first bought my psr2000 ,initially i was going to buy a 9000pro,but on talking to a couple of dealers i realized that for half the price i was getting a lot more than half of the quality about ,3\4 (my choice),,maybe a lot of people felt the same way,,,one thing i do know is this,,yamaha produce excellent boards,and if you make your top of the range boards the BEST IN ALL FIELDS ,you will always stay on top providing your prices stay competetive,just my 2 pence worth,mike