at a minimum i think you should rotate the pump head 180 degrees so the inlet/outlet are on the top. It wont be as good as a vertical alignment but imo better than what you have now. I think it will be hard to prime as you have it, the air will get trapped in the top of the head and not be able to escape. So like this -o- instead of this _o_ if that makes sense. Looks good otherwise, i like the idea of the cart for the storage of the gas bottles, and nice burners also.