S-class tower
 

So im back at playing SH4, im trying to edit files so i can get AA gun on S18 in 1941, i've tried changing date to 1941, now i got a problem that even if i start career in 1943 i dont have the aa gun mount. So what file do i need to edit? ive tried upgradepacks.upc, UnitParts4SClass.upc and weapons.upc
OK, i finnaly got conning tower, but there is no slot for AA, the gun is there, but i cant mount it, the button is normal blue, gun is there but cant mount it, or replace gun with another