Hey Im thinking about fabbing up a custom slip on. I like the dual outlet like the pinebox. maybe Ill do a single, but like that same design. I have a lot of machines and tools at my disposal, and my friend thinks he can do it... but you know friends... so I want to make sure I can tackle it myself. Has anyone done their own? can I see it? do you have any suggestions. Hoping my buddy actually is being truthful and we can knock one out. Also I know in NA motors you generally want some back pressure so what can I do to keep some in my design, but not restrict it too much? Id like to see what other people have done as well!