I have been stringing for several years now and this is not just my error. I have now had this happen 4 times. I am stringing my LM Prestige MP with PolyStar Energy. The prestige has little slots for the string to go in on the Grommets and if you have one you know that when stringing it will "pop" into the grament when tension is applied. I use a dropweight and have been "gently" letting down the drop weight rather than having it "fall" on its own like I usually do with other strings. When the string catches on this slot as I am tensioning, and pops thru it has broken doing the crosses on four different string jobs. I have ended up using Lux ALU or Bab Huricane for the crosses so I can finish the string job. Has anyone else had this happen. I have not had this trouble with other strings on the same racquets. I like the way the string plays in a hybrid since I have not been able to complete a full job of it. Can I get replacement Grommets that are open like the Instinct or other Head racquets. Please Help.