ive got an 8 inch metalbestoes chimney that clears the peak of my roof by maybe 4 or 5 feet. When the wind was right the smoke would follow the roof down and come in a window. I went to buy another section of pipe and it had to be ordered and was around 400 dollars. He suggested to try a regular piece of stove pipe and see if it worked before spending money on the right pipe. I did and it works great no more smoke smell. So my question is what’s the down side to leaving the section of stove pipe in there.