Finally installed the F600 after it was sitting on the hearth since May. The liner was a bit of a pita. 6 inch flex going down a 7X13 20 ft flue. Had to use 2 adjustable 90s to get to the stove. Secure everything with screws and on spot where the T cleanout met with one of the 90s, the fit was not as snug as I would have liked, so I used a little cement. Did a match test around all fittings, and everything was great! Put a lot of roxul in there and then rested a block off plate. I am pumped and ready for the cold. Had first break in fire and got her to 200 degrees and she is beautiful Will have a 2nd today and final tomorrow. (and the ash door was open for only a few second to get her going) Oh yeah, and just found out the wife is pregnant with our second child Great days!