Wow, a 'sticky'!. Thanks everybody. Here are some gunstation settings that put the guns close to where they should be but a .Dp and dedicated airfile would be nice.
[GUNSTATIONS]
; 20mm Cannons
gunstation.0=1,46,1,0.1,890,2,0.05,1170,4,100,1d1*71.9,0,0,0,-0.31729,0,0,0,0,0,0,13.9
[guns.0]
gun.0=200,0.36,-0.55,4.72,0,0,1,200
gun.1=200,-0.36,-0.55,4.72,0,0,1,200
gun.2=200,0.23,-0.66,4.72,0,0,1,200
gun.3=200,-0.23,-0.66,4.72,0,0,1,200