Originally posted by ElectricZombie
None? All of my Spyderco lockbacks (4 I think) have some vertical blade play.
Just checked all my front lock Spydercos for vertical blade play, the results
5 out of my 5 unlined micarta handled ones have a minute amount, not enough to see, just enough to feel.
My only single liner micarta handled one, a JD Smith, has none.
None of my 14 stainless, and stainless with scales have any play. In this group I've include my bone and stone Kiwis, Persian, Chinook II, Massad Ayoob, C27 Horn and C76 Delica as the dual stainless liners on them put them, in my mind in the same category as the all stainless ones.
Neither of my 2 almite ones have any play either.
1 out of 3 of my CF handled ones, a Dragonfly, has the same minute amount of play, the others, a Police and a Delica, have none.
1 out my 13 FRN handled ones, a Ladybug, also has a minute amount. None of the rest, including one of the much maligned BRK Natives, have any. My SpyderHawk will, the first time you put downward pressure on the blade, give one little trace of it, after that, it's tight as a drum. Think this may be mostly a factor of it not really being broken in.
My Black Hawk, the only unlined G10 handled Spyderco I currently own, is also the only one with what I would consider excessive vertical play. It is the only one where, if I open it, hold it by the handle, and shake it up and down as if trying to dry it off, I can see, feel, and hear the blade rattle. Considering the raft of other fit and finish issues this particular knife displays, my guess is that it was a factory second.
Of these 39 knives the two I have the most total confidence in are my Persian and Chinook II. I have an old sofa, heavy wooden frame, exposed wood arms, I can hook either of these knives under one of the arms and yank up hard enough to lift that end of the sofa off the ground, with the spine of the blade. While my Ayoob, and a few of the others as well, may very well be up to this task, they don't give me the same degree of confidence to try it.
As for the Boye dent, perhaps to some people, and for some grips, they may inspire greater confidence, I've never had a problem with any Spyderco front lock, and fewer than half, eighteen to be exact, of the ones I own have the dent, but would not want to try the little trick I mentioned above with my Buck 501, even with something considerably lighter than a sofa, as I know from experience its back lock, positioned at the extreme end of the handle, can be at least partially disengaged by the heel of my hand when used that way. The only position I can hold the Chinook in and get the lock to partially disengage is if I hold it with the blade at the thumb end of my hand and the edge of the blade toward my knuckles. In this grip, my middle finger can depress the lock significantly, but not quite enough to cause full disengagement. I suspect this because the outermost joints of ones fingers, which can move significantly more than any other part of the hand except the thumb while gripping something tightly, are on the back of the handle and, at least for me, the middle finger lands squarely on top of the lock. Of course using that same grip, I can induce the same result with my Persian or Ayoob, which have Boye dents. In any event it is next to impossible, even in this odd (and to me anyway rather useless) grip, to get any of them to disengage completely. Since I do not look on any of my knives as weapons, the thought of what odd positions a knife might get into in a high-stress do-or-die situation is not my highest priority when buying a knife. With that in mind, I am glad that none of my Kiwis or Horns have the dent and do wish they'd have left it off the Persian, it's such a pretty knife that it was a shame to break the line of the backstrap with it. On the more "tactical" looking Spyderco's, including the Chinook and the Ayoob, I'm neutral. While I don't feel it's presence necessary, or its absence a cause for worry, it does not bother me in the same way it does on the Persian.
Thom, I know zilch about MBC, could you enlighten me as to why the presence of a Boye dent would make a knife unsuited for it? While I personally don't see any positive benefit to them and, as I mentioned above feel they detract from the looks of at least some knives, I can't, for the life of me think of any tangible negative impact one might have, but realize that may be due to my lack of knowledge about MBC techniques.