Michael P Mission Hills , CA October 10, 2016 All the teeth on the coupler and the jar assembly were ground to nothing My daughter decided to use the blender and forgot to lock the jar in place and ground all the teeth on the coupler and the the jar assembly down to nothing. I went looking on how to fix it and found a repair video. The video sent me to your site. I bought the parts and replaced them, and for a fraction of what it would cost to replace the blender, I have a brand newish working perfectly blender! Thanks! 11 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes