You mean the thing that holds the tail inside of the washer? I've had good luck with G1s and G3s just by squishing it with my needle nose pilers. I can't tell you off the top of my head how I squish it, as I haven't done it in a long time, but I think that I'd smash it open end up and then it would flatten a little bit to look kind of like this o_o. Then, turn the pliers sideways and grip one of the "o" ends and untwist/roll it. Do the same with the other. I hope this made sense! I'm not sure if it will work on every tail, every time, but it has the couple times I've done it