Hi Bernie,

This is exactly what I mean and good for you !
But obviously it is only the tip of the iceberg.
In my opinion most of the sounds in the factory presets are pretty lousy, because they have been included as a last minute thought.
Example, and this goes for virtually any brand or make of keyboard:
Pick a good electric piano sound, preferably one that has affinity with the Yamaha DX sort of piano sounds.
Remove all or virtually all of the reverb.
Add substantial Chorus or Ensemble. If possible rais or lower the filter of the basis sample being used for this sound.
Nine times out of ten you will get a substantially better electric piano sound than the one you have been using so far......
Just give it a try !!