What kinds of accuracy are people experiencing with Field IQ controlling their NH3?  I've got a 33' bar with a Raven Flow Meter and and a KZ Fast Valve.  When using the 710 cal number we were consistantly putting on about 5 lbs(2.5%) low.  Increased the cal number to 725 and we appear to be putting on about 5 lbs high.  Tomorrow I'm going to change the cal number to 717.  How accurate should I expect this thing to be?

Also, are there any advanced parameters to help speed up responsiveness of the fast valve?