Il admit at first I thought they were a complete waste of time. However after using them for a good few months now , they are a clever idea.
See , there is less (no) chance of the back of the jets snapping or getting weak now.
I don’t swap them over to pencil jets so I don’t know about that but if Gardiners are making stuff that last longer then that is a good thing. Iv never complained about the quality or longevity from Gardiners , I think they’ve got it spot on.
Unlike a certain manufacturer who’s making water stopping devices with inferior springs so they don’t last long , it’s going to drive business away from him imo .