Help with Mirroring Oculus Controllers

Currently I am trying to write a script that will mirror the movements of one controller onto the other for users who only have 1 functioning arm. Mirroring the y axis and z axis were easy since they move together and the rotation was easy to mirror. I am unable to mirror the x axis movement. I want it so that if the one hand moves out the other does the same, and they both move in together. Any ideas how I may be able to do this? I have attached my current script.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class VRMirror : MonoBehaviour
{
public bool mirrorLeft;
public bool mirrorRight;
public GameObject leftHand;
public GameObject rightHand;
void Start()
{

}
void FixedUpdate()
{
Transform left = leftHand.GetComponent<Transform>();
Transform right = rightHand.GetComponent<Transform>();
if (mirrorLeft)
{
Vector3 leftPos = left.position;
Quaternion leftRot = left.rotation;
leftRot.y = -leftRot.y;
right.position = leftPos;
right.rotation = leftRot;
}
else if (mirrorRight)
{
Vector3 rightPos = right.position;
Quaternion rightRot = right.rotation;

rightRot.y = -rightRot.y;
left.position = rightPos;
left.rotation = rightRot;

}
}
}