[Brian T]

I cannot give you advice on the 2 tooth box, I was faced with the same decision with my 7 tooth box, due to the difficulty with removing the worm from the shaft I replaced all the worn parts and assembled the box completely and ended with 1 inch of play, tested on the bench before installing, before was 4 plus.
You have a lot more adjustments with the 2 tooth, I am sure someone here will step in with advise.