Sal and Vince, its the "new" model, right after you started the 3-screw clip. Had it about a year. No grooves on the choil. Its not the pivot tension either (I stay on top of that), it doesn't get slung open, the stop pin looks mint all the way around; the liner is just wearing from the friction. At least I assume its the liner. The 440V tang shouldn't be wearing down from a spring-hardened leaf. Got a Terzuola ATCF that rotates with the Mil for my daily carry and its doing the same thing. I play with them a LOT though. No biggie, like I said. Just curious down the road as to procedures to have the leaf replaced when the time comes. Its simply wearing down. All liner locks seem to have this one drawback, and I apparently accelerate the process ;-). I know Bob T will take care of the ATCF, but the Mil is the first prod liner lock that I have liked enough to not simply "retire". Thanks for the concern, jeff