How do i limit rotation that uses RotateTowards without making my object vibrate?

I'm trying to make a tank game, where the turret and gun of the tank rotate to a raycast from the main camera. Everything works fine except for the gun elevation, which i want to be limited, so the gun can only rotate a certain amount of degrees up and down. With my code the gun starts to vibrate when it gets to the rotation limit. I've spent way too much time on this already, so any help would be greatly appreciated.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class GunElevation : MonoBehaviour
 {
     public bool local;
     
 
     void FixedUpdate()
     {
         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         if (local == true)
         {
             RaycastHit hit = new RaycastHit();
             if (Physics.Raycast(ray, out hit))
             {
                 float rot = transform.localEulerAngles.x;
                 if(rot>180)
                 {
                     rot = rot - 360;
                 }
                 Vector3 direction = hit.point - transform.position;
                 direction = Vector3.ProjectOnPlane(direction, transform.parent.right);
                 Quaternion target = Quaternion.LookRotation(direction, transform.parent.right);
                 transform.rotation = Quaternion.RotateTowards(transform.rotation, target, 35 * Time.deltaTime);
                 
                 if (rot > 10)
                 {
                     transform.localEulerAngles = new Vector3(10, transform.localEulerAngles.y, transform.localEulerAngles.z);
                 }
                 if (rot < -15)
                 {
                     transform.localEulerAngles = new Vector3(-15, transform.localEulerAngles.y, transform.localEulerAngles.z);
                 }
             }
         }
     }
 }