Can you play single note trills on your RD700GX?

[azone]

I really like the RD700GX for the most part and have used it for 4 years. It's more like concert grand than anything else and you need to be strong physically and technically to make it sing. One thing that I notice is when I play a piece with single note trills I can't play them well. The key does not rebound and is sluggish. This happens with either the internal sound or Ivory I. Does anyone else find this? Can you play single note trills on yours?