[coolfile]

Make the technical gun only used by its passage not its crew
first, it is for ZH only.
since the most important code is

ArmedRidersUpgradeMyWeaponSet = Yes

it should be placed into Behavior TransportContain.

the next step is to change the default weaponset to none and add a PLAYER_UPGRADE weaponset.

  WeaponSet
    Conditions = None 
    Weapon = PRIMARY None 
  End
  WeaponSet
    Conditions = PLAYER_UPGRADE
    Weapon = PRIMARY TechnicalMachineGunWeapon
  End

then add the condition PLAYER_UPGRADE to weaponset CRATEUPGRADE_ONE and CRATEUPGRADE_TWO.

in the art section, hide the subobject UITech-SKN in defaut and show it when weaponset upgraded. for example:

    DefaultConditionState
      Model = UITech_SKN
      Turret = Dum-TurManMVR
      TurretArtAngle = 180  ; this turret has art pointed 180 degrees backward
      HideSubObject = 20Cal 50Cal RPG MuzzleFX01 MuzzleFX02 MuzzleFX03 UITech-SKN
      ;IdleAnimation = UITech_SKL.UITech_STA 0 6
      ;IdleAnimation = UITech_SKL.UITech_IDA
      ;IdleAnimation = UITech_SKL.UITech_IDB
      ;AnimationMode = ONCE
      ShowSubObject = 20Cal
      WeaponMuzzleFlash = PRIMARY MuzzleFX01
      WeaponFireFXBone = PRIMARY Muzzle01
    End

    ConditionState = WEAPONSET_PLAYER_UPGRADE
      IdleAnimation = UITech_SKL.UITech_STA 0 6
      IdleAnimation = UITech_SKL.UITech_IDA
      IdleAnimation = UITech_SKL.UITech_IDB
      AnimationMode = ONCE
      ShowSubObject = UITech-SKN
      WeaponMuzzleFlash = PRIMARY MuzzleFX01
      WeaponFireFXBone = PRIMARY Muzzle01
    End

then add the condition WEAPONSET_PLAYER_UPGRADE to other states.

finish! enjoy it please.

problem:
when the object UITech-SKN is hidden, the weapon objects are hidden too. however, the weapon objects, such as 20Cal, 50Cal, RPG, are not linked to UITech-SKN in hierachical pivot structure. Why does it happen?