Both knives are new in box. Both knives are perfect to me. The 561 opens smooth and unlocks smooth as silk. The blades on both knives are centered and razor sharp. The BM flipper works smooth as silk to me. I sure can't understand why some people says that a flipper won't work with a axis lock. It opens as good as any flipper that I have tried. $195 on the ZT and $110 on the BM. I will get pictures up later. looking for a BM 810 contego or spyderco southard.