Dear BFers, I am not sure if this is normal, but my ki5401a2 seems to have a weak detent. Basically I cannot flip it open without using a wrist flick (if I only use the flipper, the blade just open partially, definitely wont lock). I tried tricks like bending the lockbar a bit to the blade side but it doesnt help. Comparing it with other flippers, I do find the detent ball does not sit as tight in the hole. Could this be the cause? Did anyone else experience the same issue with this model? any suggestion on fixing the issue is appreciated. I would like to add that other than this issue, I enjoy this big and beefy knife very much.