The sebenza. I have owned both a large and a small classic. Both brand new from the factory. They are extremely well made and very good looking. I just do not like the ball and detent system to retain the blade. It simply is not enough to feel comfortable that the blade wont deploy when unwanted. The axis lock and standard lock back knives give me the kind of blade retention I require. Another gripe I have with the sebenza is the pivot bushing used. I do not like how extremely tight the tolerances are with this setup. Everyone claims that with the pivot bushing, you can cinch the screw down "as tight as you want" and you will still have the same smooth blade opening action. FALSE. Titanium is a soft metal (relative to steel). If you cinch the pivot down really tight, all you are doing is pushing the bushing into the titanium slabs to the point that the purpose of the bushing is defeated. If you use the provided allen-wrench to tighten it, and orient the wrench so that you are turning it by the shorter length (less leverage orientation), then you can tighten it pretty much as tight as you can in that position. But the fact is, nothing is ever tight enough if you are using the wrench that way. I prefer to tighten things so that they will not come undone under stress/torque/impacts. I tried taking off about .005" off of each washer so that I might allow myself the ability to tighten the pivot nice and tight while allowing smooth playless opening/lockup. It did allow me to tighten the pivot nice and tight without any bladeplay, BUT, the lockbar putting side-to-side pressure on the blade made opening action spotty and uneven in smoothness. So I had to resort getting everything back to its original tolerances (relative to the altered bronze washers). I measured each and every part ( washers, bushing, stop-pin, rear spacer) with my mic that is acurate to .0005". So after I re-fit the parts, it was back to normal exept the bushing,stop-pin, and rear spacer being about a thousandth of an inch smaller.
So basically, I dont like how the blade comes open so easily, and how the pivot cant be tightend to an assuring tightness without compressing the bushing into the titanium thus sqeezing the washers.