Jeffrey...I started using expo with all my aiplanes a few years ago using a Futaba 8UAP and it has made all the difference in the world. There is no good setting for everyone as it all depends on your own feel of the airplane. However, I've found that a good starting point is -25% on aileron and elevator on both low and high rates. This setting is programmed in when I finish building and am setting up the throws before the maiden flight. I end up changing the expos as I get more comfortable with the airplane and get a feel for it's capabilities.

Hope this helps-Damon