Strange trigger problem

Using Paul Dana's Turret Resource

Here is my Ai Turret's onAdd()

function AITurretData::onAdd(%this,%obj)
{
   Parent::onAdd(%this,%obj);
   echo("AITurretData::onAdd");

   %size = %this.triggerRadius;
   %pos = %obj.position;

   // now we have to give the static shape a
   // controlling trigger of the right size and location
   %trigger = new Trigger()
   {
      dataBlock = AITurretTriggerData;
      polyhedron = "0 0 0 1 0 0 0 -1 0 0 0 1";
   };
   echo(%obj.position);
   %x = getWord(%pos, 0) - (%obj.getDatablock().range) /2;
   %y = getWord(%pos, 1) + (%obj.getDatablock().range) /2;
   %z = getWord(%pos, 2) - (%obj.getDatablock().range) /2;
   %position = %x @ " " @ %y @ " " @ %z;
   %trigger.position = %position;
   %scale = %obj.getDatablock().range *2;
   %trigger.setScale(%scale SPC %scale SPC %scale);

   echo("TriggerPos: "@%trigger.getTransform());
   %trigger.setOwner(%obj);
   %obj.trigger = %trigger;
}

Now when I call this on add method when deploying it as a player all is well.

Probelm is when I place a turret within the mission editor. The trigger position starts at 0 0 0 and gets modified with the + or - (%obj.getDatablock().range) /2 instead of starting off with the turret position.

Am I missing something here?