Any news on the homemade one?
Worked like a champ. It took only two times to get all the valve set. First time was for 35 seconds of gas and O2. Then I did a minute and I think thats the answer. Now to see if it really kills them. After the second blast I will be shocked if he is still alive. People that live below me (about 400ft away) heard both go off. They said the second blast was load. :0)