Well, I've spent the better part of my holiday weekend trying to install my 6 inch liner for my insert down my 10 inch round poured concrete liner, to no avail. I've got a corner chimney, and there is a 45 degree turn about 6 feet from the fireplace. I cut the end of the liner to make a tapered pulling cone (ala Elk), even pulled it out again and cut more of it to give it a better chance of making the turn, but it's not coming down. I had a buddy on the bottom pulling with me up top pushing and twisting it and it would not go. The only thing I can think of is to get the guy out here who poured the liner and get him to chisel out more of the liner so I can make the turn. I've been waiting to get this thing going since last Spring, and it's driving me crazy