Here is a question I have. I burned my farm stove for the first time in cooler/cold weather. II have a few problems first I know the wood I was burning was not near ready, but also the chimney is a bit short at somewhere around 13ft tall. I think I need to extend the chimney taller to get a bit better draft. I have a 6" liner that ends in a top plate and normal cap that came with the package. I have heard folks on here say I can extend it upward with a class A chimney. My question is how do you do that? The inner diameter of the flexliner is 6"s right, which sits down in the top plate which my guess to be a 6.5" or so inner diameter. IF I cut the liner flush with the top cap (right now it protrudes 5"s or so maybe 3"s from the top plate.) and slip the A pipe into the liner, what holds the A pipe to the top, since it does not lock to the top plate?