I noticed the loose sheath when I recieved mine. Here is a do it yourself fix. I did the fix to both my sheaths. I removed the knife, took a C clamp and slightly preloaded the opening on the sheath. I then used a heat gun to heat the plastic, as soon as the color started to change I stopped the heat. I then let it cool. The retention is very strong after the mod. I will try and measure it in number of cans this weekend.