Product review (5 stars): Worked like a charm.
Wow!!  Worked great.  No more leaking or spraying water.  Fits tightly on the adapter, no wiggling. I wish I had done this sooner.  Really not that hard to assemble, I just kept it straight up and down, and the new "teeth" stayed in place.  They are small, so beware, and work over a table, not a drain.  A pair of tweezers will also help.