oh the sifus, dont even get me started bashing those lol. while the smaller REKATS semed to do "ok" with the "rolling lock", the sifus sure didnt do well, lotsa lock probs with those, if ya have one and it locks well, be happy and be gentle with it (ie no inertia opening, no hard opening, no gunk in the action, etc) 'cuz if it breaks i dont know of anyone who will fix the thing. and if ya inertia open it, or open it "briskly" ya will have probs............
i have had 3 and all developed lock probs with use, even when i knew not to inertia open it, open it hard, etc. imho its due to the inertia of the big blade and the very close tolerances required for the rolling lock to work correctly. after i saw a schematic of the internals, i could understand the problems with it imho tolerances must be just too close for a production knife, as far as REKATS claims of "the lock of the 21st century", BS i say.
the cheerfull , helpfull, lovely folks at REKAT didnt help matters any, either.
imho if ya want a large folder get a cammilus maxx, i like the stilletto version myself.