Hi, I have a 6" x 9" chimney flue (inside diametre) and was wondering what size of stainless steel flexible chimney liner can be installed? Will a 6" chimney liner fit? Is it a do-it-yourself kinda job? Can I run the line straight to the stove from the top of the chimney or do I need to install a tee with a clean out cap? If you have done this before, can you guide me through it. Thanks in advance,