I've had a blast with this and can suggest the following tweeks;
[FlightControl]
StallSpeed=88.51
CruiseSpeed=224.84
ClimbSpeed=218.85
CornerSpeed=239.29
MaxG=7.33
MaxSpeedSL=344.22
MachLimit=2.20
PitchDamper=0.8
RollDamper=0.75
YawDamper=1.0
GunBoresightAngle=0
RocketBoresightAngle=-3
The above just firms things up.
[Rudder]
SystemType=CONTROL_SURFACE
InputName=YAW_CONTROL
ReverseInput=TRUE
MaxDeflection=20
MinDeflection=-20
CDdc=0.0237
Cydc=0.2080
Cldc=0.0450
Cndc=-0.1600
CndcAlphaTableNumData=15
CndcAlphaTableDeltaX=4.00
CndcAlphaTableStartX=-28.00
CndcAlphaTableData=0.873,0.905,0.933,0.956,0.974,0.988,0.997,1.001,1.000,0.994,0.984,0.968,0.948,0.923,0.894
ControlRate=0.8
;HasGearDownSetting=TRUE
;GearDownMaxDeflection=6.0
;GearDownMinDeflection=-6.0
ModelNodeName=Ruddera
ReverseModelOrientation=TRUE
RotationAxis=Z-Axis