Here are some photos of the new replaceable polyurethane bush spear tail. Previously the polyurethane bush was molded over that one-piece tail and there was no easy way to replace it, in fact for this reason I purchased three extra spears with my "Taimen" PVRM600 gun. I had a slight hand in this new design as for some time I had my own thoughts on how to do it. As you can see the rear end of the new tail now screws on in order to trap the polyurethane bush in place and can be tightened up with a thin rod or screwdriver blade passing through a small transverse hole located in the extreme rear. A slight taper on the spear tail prevents any problems with the transverse hole passing through the vacuum cuff. Tension provided by the polyurethane bush being squeezed up prevents the spear tail from unscrewing during use.