Have you tried the new 840's & 845's
I have two of them and have done all kinds of test and find them strong as hell, as a matter of fact I have put my CS Voyager Tanto 4 incher in my dresser drawer because I feel the BM 840 and 845 are better knives.
They have a great shaped handle, have adjustable tension screws for blade adjustment, ATS-34 quality blades, and are reasonably priced. What more can you ask?
P.S.
Check how deeply the lock sets in the blade ..it's DEEP and SECURE.
wll