If you are set up as in pic 6 here
http://www.rcuniverse.com/forum/fb.asp?m=3774382 then all you need to do to get back your rudder throw is move the clevis "in" on the rudder control horn. This will increase the amount of throw. Crank down the nose wheel and then reset the rudder clevis as needed.

Exponential "softens" the response you get near the neutral stick position but still allows full deviation if you push the stick all the way over. It is also adjusted by percentage and maybe 30% would be a good starting point.