Fine folks, some close family friends of ours recently purchased a Napoleon 1101 Insert and they asked me to help them install it. It will have a 6" stainless steel flex liner. It is going to go where an older original factory built fireplace and chimney are now. I have done lots and lots of studying up so I know more or less or more what I will do to install it however I was wanting to ask the experts here for any helpful hints that they might share. Thanks as always.