Hello everyone! You guys and gals have amassed an amazing amount of knowledge on this site! My wife and I just bought her grandparents farm house. It has a new roof, insulated attic, siding and windows, and we are still spending 800 a month in fuel oil for the house! A friend of ours gave us his QF Classic Bay 1200 insert when he upgraded this summer. I am running into problems with people not wanting to install it because it wasn't purchased from them. I have decided to do it myself! I am embracing country living and becoming a DIY'er. Very handy around an old house that needs everything! But I do have some questions! The chimney in the house currently has a 6" oval liner, but my stove is a 4" inch round (I believe). I haven't had any luck finding an adapter that is oval to round with a left offset (An offset would make it easier for install). So my questions are... 1) Anyone know if they can be found, bought and from where? 2) Can I run a length of 4 inch pipe inside of the existing liner? Thank you guys so much! I look forward to learning and sharing my knowledge!!