Originally posted by jedi:
Hi Ian,
WOW !! That is strange 
So far every upper end PSR from the Y2K that I have seen or played has had that same slightly lower C-6 key.
Mind you it is not off by much , and most people would never see it , but none the less it is there.
I would say 1/32" to 1/64" of an inch lower than all the rest of the white keys.
The PSR-640 and 740 were ok , it started with the Y2K.
It really is nit picking , I`ll admit , but it is there.
If yours does not have that problem , then you truly do have a one of a kind !! 
Later ,
Gary Actually, Gary...I have had five of them: two 2ks, two 3ks, and an S9900... plus all the others I have played in the stores over the last several years...never actually witnessed that phenomenon.
Yep, you're having a tough time getting the perfect arranger, at least for you...good thing you're not anxious to get one.
Now, back to the S900 and my morning practise.
All the best,
Ian