I am planning to use the mig tip. I was under the impression that with the zoeller design I used the mig tips but did not have to cut the actual tip because because the length of the burners was adjustable inside the the larger pipe. With the t burner the location of the mig tip is fixed inside the larger pipe and the tip must be cut to make adjustments.
I am making it to save money, but mostly because I already had most of the parts lying around. I only need the gauge, (2) 1/4" ball valves and the mig tap at this point.
The typical brass ball valves at the box store that I usually buy for water say WOG. They have other valves they are advertising as for gas (shorter handle with out the rubber grip) but the smallest they have is 1/2". I am thinking of getting needle valves for greater control.
I'm not planning on making it to make money anytime soon. All though its great if it happens. I am planning on using it around the farm. I work with draft horses and there is a metal piece on the harness called the hames. It fits in a groove in the collar. This is how all the weight is transferred from a push action by the horse to a pull action on the implement. It is important that this piece fits in the groove well. One of mine fits poor so this will be one of my first projects. I don't have a lot of free time but I am hoping it will eventually lead to making some of our own tools, hinges, latches, hooks, etc, as well as knifemaking.