Trouble spawning endless platform

I'm having trouble spawning platforms for an endless runner/faller type game. Mine is an endless faller, so I think you can imagine what I'm trying to do.

The problem I get is I always have a gap in between at least 1 of them. The gap grows a bit sometimes. If I don't have the .2f added in, the gaps are even worse. When I speed the moving up even a bit, the gaps are about half an inch thick. This is driving me crazy. I've searched all over the forums for the answer to this. I always see people saying to use += so you won't have gaps, but that is not working at all for me. Anyone have any idea what to do? Thanks!

Here is what I have right now.

Spawning script:

 using UnityEngine;
 using System.Collections;
 
 public class WallSpawnScript : MonoBehaviour {
 
     Vector3 zeroPos = new Vector3(0, 10f,0);
 
 
     public void WallSpawn()
     {
         int objToSpawn = Random.Range (1,2);
 
         switch(objToSpawn)
         {
         case 1:
             Debug.Log ("hit");
             var obj = SmartPool.Spawn ("Wall1");
             obj.transform.position = zeroPos;
             Vector3 pos1 = new Vector3(0,((obj.transform.localScale.z * -3) + .2f), 0);
             obj.transform.position += pos1;
 
 
 
             break;
 
         case 2:
             Debug.Log ("hit");
             var obj2 = SmartPool.Spawn ("Wall2");
             obj2.transform.position = zeroPos;
             Vector3 pos2 = new Vector3(0,((obj2.transform.localScale.z * -3) + .2f), 0);
             obj2.transform.position += pos2;
             break;
 
         }
 
 
     }
 
 
 
 }

Object Script:

 using UnityEngine;
 using System.Collections;
 
 public class WallScript1 : MonoBehaviour {
 
     public WallSpawnScript WallSpawnScript;
 
 
     void Update () {
 
         this.transform.Translate(0, 0, 10 * Time.deltaTime);
 
 
         if(this.transform.localPosition.y > 10)
         {
             SmartPool.Despawn(gameObject);
             WallSpawnScript.WallSpawn();
 
         }
     }
 }