Hello forum, I bought a universal BBQ burner to replace my old rusted out one. While the heat is very even now, the color of the flame leaves a lot to be desired. This is what it looks like on high: On low, the flame looks almost perfect, which makes me think that there is not enough air getting mixed with the gas. It turns out that the air intake cannot be adjusted on this, so in hope of increasing the air intake I cut out the grill on the air intake and tried drilling some holes. The result was only marginally better. You can see it a little on the first image. Top flame is with stock air intake, bottom with my modifications. Also after cutting the first hole, the titanium drill bit became completely dull, which explains why the second hole is still unfinished. I'm gonna have to file the drill bit now, but... before I waste more of my time drilling into some relatively thick stainless steel, could I just punch some holes into the aluminum tubing? Image of the whole burner below: Or would that be a very bad idea? My gut feeling is telling me that the gas might leak out from those holes, but then why doesn't it leak out at the air intake holes? I don't really understand how those venturi tubes work so clarification is also welcome.