jp47 - LOL I have a real hard time when I sit down at a piano because the feel is so very different than an arranger keyboard.
I found the PSR-E423 to be softer than the Pa600. I hesitate to say it the other way around - that the Pa600 is stiffer; as the difference is not that great.
Somewhere in an earlier post I believe someone indicated that key pressure (not sure if those are the correct words to call it) could be varied on the Pa600, but I'm happy with the current setting and I can't find the spot to change it anyway. The two manuals are very good except for having a reasonable index to find things.
What I have noticed is that when I press the Global key to go into the Global setups a main selection screen appears with 7 touch selections, however, if I select one of the 7 selections pressing the Global key again or Exit then Global will not return me back to the main Global screen. The only way I've found to get back to the main Global screen to to shut the power off and on again. Not a big deal, but not ideal either.
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Monty -- KORG Pa600