No they really do test something this important upon receipt and they do re-work their con-ops thanks to new higher sensitivity and new techniques designed to hide trace. When was the last time you saw them swipe the inside fabric of your carry on? Plenty has changed and the B-220 CAN reveal much more. See, when you SET THE SPEC, the meaning is, resolution is higher, since less particles are needed to "register", the swab can find more in more places, if they place it right. Maybe Glenn was right, this stock is NOT for you.