I must say that after getting my Matriarch I have a new-found respect for Spyderco's FRN-handled models. Once I discovered lined G-10 and Ti I almost never looked back, which would have been my loss! Previously, almost every FRN model that I have handled/owned had an issue with action smoothness and/or blade play. (OK, so I'm verrry picky, but try this: Take an open Endura or Delica, place the edge on a cutting board or phone book, and press with the handle as if cutting. See/feel the blade shift upwards a little?)
However, my minty fresh 2001 Matriarch not only has zero play, it is very smooth and flawlessly constructed to boot. Although I have never had a metal clip spin out like some people have experienced, it looks like the recess in the handle where the clip sits is now deeper and features a raised. molded "border" that should provide a greater measure of security. I will probably seek out an '01 Delica (blue one!) and maybe another(!) Endura based on my experience with my new Matriarch. and then I guess I need to get a Calypso Jr. Ltw. too. Damn.
Paul