One thing to keep in mind... The guy from Trident/Crusader Forge did some testing of lock mechanisms before he decided on the framelock. His initial design was for a lock-back, but the stress-testing he did showed that when pressed to the point of lock mechanism failure, the lock-back went from holding strong, to a catastrophic failure in the space of an instant, and it folded. The linerlock folded part way, but the lock would jam, protecting the fingers (theoretically). Keep in mind this is just one type of lock stress, but it may be something to think about. I wish Sal read this thread and he could chime in on how a lockback fails, vs a linerlock, when pushed to its limits.