door problems

hello everyone. so the code works but when the door opens its stretched out or it shrinks. depending on the angle. can any one help or give an alternate code to a doornot changing its size! thanks (please note im using a model for the door) so not a simple cube

// Converted from UnityScript to C# at http://www.M2H.nl/files/js_to_c.php - by Mike Hergaarden // Do test the code! You usually need to change a few small bits.

 using UnityEngine;
 using System.Collections;
 
 public class dddd : MonoBehaviour {
     //Make an empty game object and call it "Door"
     //Rename your 3D door model to "Body"
     //Parent a "Body" object to "Door"
     //Make sure thet a "Door" object is in left down corner of "Body" object. The place where a Door Hinge need be
     //Add a box collider to "Door" object and make it much bigger then the "Body" model, mark it trigger
     //Assign this script to a "Door" game object that have box collider with trigger enabled
     //Press "f" to open the door and "g" to close the door
     //Make sure the main character is tagged "player"
 
     // Smothly open a door
     public float  smooth= 2.0f;
     public float DoorOpenAngle= 90.0f;
     private bool  open;
     private bool  enter;
 
     private Vector3 defaultRot;
     private Vector3 openRot;
 
     void  Start (){
         defaultRot = transform.eulerAngles;
         openRot = new Vector3 (defaultRot.x, defaultRot.y + DoorOpenAngle, defaultRot.z);
     }
 
     //Main function
     void  Update (){
         if(open){
             //Open door
             transform.eulerAngles = Vector3.Slerp(transform.eulerAngles, openRot, Time.deltaTime * smooth);
         }else{
             //Close door
             transform.eulerAngles = Vector3.Slerp(transform.eulerAngles, defaultRot, Time.deltaTime * smooth);
         }
 
         if(Input.GetKeyDown("f") && enter){
             open = !open;
         }
     }
 
     void  OnGUI (){
         if(enter){
             GUI.Label(new Rect(Screen.width/2 - 75, Screen.height - 100, 150, 30), "Press 'F' to open the door");
         }
     }
 
     //Activate the Main function when player is near the door
     void  OnTriggerEnter ( Collider other  ){
         if (other.gameObject.tag == "Player") {
             enter = true;
         }
     }
 
     //Deactivate the Main function when player is go away from door
     void  OnTriggerExit ( Collider other  ){
         if (other.gameObject.tag == "Player") {
             enter = false;
         }
     }
     //@youtube.com/user/maksimum654321
     //www.warmerise.com - check this game
 }