This is pretty harsh on pesky MIGs.
I plugged this in "my" P2V. Copied and pasted from Capuns B-47E:
[TailGun1]
SystemType=FLEXIBLE_GUN
GunTypeName=20MM_M39
MuzzlePosition=-0.1862,-17.5749,0.2923
MaxAmmo=2000
TracerLoading=5
BurstAmount=100
GunnerID=1
MinExtentPosition=-0.25,-15.54,-0.51
MaxExtentPosition= 0.25,-14.72, 0.23
[TailGun2]
SystemType=FLEXIBLE_GUN
GunTypeName=20MM_M39
MuzzlePosition=0.2281,-17.5749,0.2923
MaxAmmo=2000
TracerLoading=5
BurstAmount=100
GunnerID=1
MinExtentPosition=-0.25,-15.54,-0.51
MaxExtentPosition= 0.25,-14.72, 0.23
[TailGunner]
SystemType=GUNNER_STATION
SeatID=4
GunnerID=1
PilotModelName=
SetCockpitPosition=FALSE
Position=0.0,-24.175,0.156
;MinExtentPosition=
;MaxExtentPosition=
PitchModelNodeName=CannonPitch
YawModelNodeName=CannonYaw
GunRange=2500
PitchAngleRate=45
MaxPitch=40
MinPitch=-40
DefaultPitchAngle=0
YawLimited=TRUE
YawAngleRate=45
MaxYaw=230
MinYaw=130
DefaultYawAngle=180
It works fine but the positions and stuff need tweeking.
Thanks Gruppe. CL