Casio_DG-20 String Tensioner Replacement

A few years ago a got a killer deal on a Casio DG-20.  I had fallen over one day after I had put it down haphazardly and it ended up breaking the thread of the original tensioner.  This is the first revision of the my replacement, I do need to make a way to prevent the small top 3M screw from biting too hard onto the nylon guitar string causing some damage.