I may need to change my header tank in my model iv because of a problem leak at the bottom fitting bushing. I think the threads were tapped to deep or I may have tightend to much. My question; is the rotational moulded tank from Kitfox the way to go or are there other options? Does the Kitfox tank have the brass fitting molded in?

Thanks for your opinions in advance, this problem is holding up my first flight.