Yep...best thing to do is just not fool with itIn for recipes! But seriously I've watched the videos for the Econo Can which is just a fitting with full size would filter screwed onto it. And when I first watched it I thought it was a neat concept since you could screw a new filter onto it when the first one gets shot out. But it doesn't work that way. The filter you get with it is engraved with a number too. So when you need a new one you have to send it back to the company. That part sucks. But what bothers me worse is that if you keep any other oil filters in your house you know for actual filtering of oil in your car then the ATF COULD claim you have more unregistered suppressors in your possession. See how complicated it gets when you mix non gun **** with your gun ****.