Dude, I'm tellin ya, they work freaking awesome even without the groove cut into the stud to ride in.
I had my Wife work the clutch pedal like don Garlits and that thing did not move a red pube hair, lovin it thanks to the guy at Napa for the suggestion.
I love the stock clips when they are new and pop right into placE, BUT if they get distorted, you might as well cross your fingers and hope they don't fall out going down the road.
I got a spare E-clip I am keeping in my tool box for a rainy day.