I am in the process of semi-restoring a new to me VC Resolute III, I have sanded it down, re-cemented the seams, and put one coat of paint on it. Next will be the gaskets, final coat and cure before I bring it in. I will be replacing an old Black Bart freestanding insert, and I would like to use my current set up as much as possible. I have some questions regarding the chimney / stove pipe. The VC manual says I can use an 8" flue, but I get confused by some of the terminology as I have noticed it tends to be interchanged at times and this is too important not to get right. The Resolute has a 6" (+/-) slightly oval chimney connector opening, is it okay to go up 9" so with the 6" pipe and then put the increaser (or decreaser depending on which website one is on Ahhh!) and use the remaining 8" pipe? The total pipe height from stove top to box on ceiling is 8'. Or do I have to purchase all new 6" stove pipe and put the increaser at the top where it connects to the box?